255505605 has 16 divisors (see below), whose sum is σ = 410599680. Its totient is φ = 135672768.

The previous prime is 255505589. The next prime is 255505667. The reversal of 255505605 is 506505552.

It is not a de Polignac number, because 255505605 - 2⁴ = 255505589 is a prime.

It is a super-2 number, since 2×255505605² = 130566228372832050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33757 + ... + 40626.

It is an arithmetic number, because the mean of its divisors is an integer number (25662480).

Almost surely, 2^255505605 is an apocalyptic number.

It is an amenable number.

255505605 is a deficient number, since it is larger than the sum of its proper divisors (155094075).

255505605 is a wasteful number, since it uses less digits than its factorization.

255505605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74620.

The product of its (nonzero) digits is 37500, while the sum is 33.

The square root of 255505605 is about 15984.5426897362. The cubic root of 255505605 is about 634.5514057364.

The spelling of 255505605 in words is "two hundred fifty-five million, five hundred five thousand, six hundred five".