255817992 has 32 divisors (see below), whose sum is σ = 653155200. Its totient is φ = 83457984.

The previous prime is 255817981. The next prime is 255817999. The reversal of 255817992 is 299718552.

It is not an unprimeable number, because it can be changed into a prime (255817999) 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, 112267 + ... + 114522.

It is an arithmetic number, because the mean of its divisors is an integer number (20411100).

Almost surely, 2^255817992 is an apocalyptic number.

It is an amenable number.

255817992 is an abundant number, since it is smaller than the sum of its proper divisors (397337208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255817992 is a wasteful number, since it uses less digits than its factorization.

255817992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226845 (or 226841 counting only the distinct ones).

The product of its digits is 453600, while the sum is 48.

The square root of 255817992 is about 15994.3112386873. The cubic root of 255817992 is about 634.8099061057.

The spelling of 255817992 in words is "two hundred fifty-five million, eight hundred seventeen thousand, nine hundred ninety-two".