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5555555 = 52394649

5555555 has 8 divisors (see below), whose sum is σ = 6696000. Its totient is φ = 4424896.

The previous prime is 5555527. The next prime is 5555567.

5555555 is nontrivially palindromic in base 10.


It is a cyclic number.

It is not a de Polignac number, because 5555555 - 26 = 5555491 is a prime.


5555555 is a modest number, since divided by 5555 gives 555 as remainder.

5555555 is a nontrivial repdigit in base 10.

It is a plaindrome in base 10.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.


It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130 + ... + 3519.

It is an arithmetic number, because the mean of its divisors is an integer number (837000).

Almost surely, 25555555 is an apocalyptic number.

5555555 is a deficient number, since it is larger than the sum of its proper divisors (1140445).

5555555 is a wasteful number, since it uses less digits than its factorization.

5555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4893.

The product of its digits is 78125, while the sum is 35.

The square root of 5555555 is about 2357.0224861040. The cubic root of 5555555 is about 177.1097556268.

The spelling of 5555555 in words is "five million, five hundred fifty-five thousand, five hundred fifty-five".

Divisors: 1 5 239 1195 4649 23245 1111111 5555555