255656381 has 8 divisors (see below), whose sum is σ = 273674400. Its totient is φ = 238094640.

The previous prime is 255656341. The next prime is 255656437. The reversal of 255656381 is 183656552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255656381 - 2²² = 251462077 is a prime.

It is a super-2 number, since 2×255656381² = 130720370292034322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255656341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112910 + ... + 115151.

It is an arithmetic number, because the mean of its divisors is an integer number (34209300).

Almost surely, 2^255656381 is an apocalyptic number.

It is an amenable number.

255656381 is a deficient number, since it is larger than the sum of its proper divisors (18018019).

255656381 is a wasteful number, since it uses less digits than its factorization.

255656381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228139.

The product of its digits is 216000, while the sum is 41.

The square root of 255656381 is about 15989.2583004966. The cubic root of 255656381 is about 634.6761992275.

The spelling of 255656381 in words is "two hundred fifty-five million, six hundred fifty-six thousand, three hundred eighty-one".