255136520 has 32 divisors (see below), whose sum is σ = 575066520. Its totient is φ = 101875200.

The previous prime is 255136477. The next prime is 255136549. The reversal of 255136520 is 25631552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 252746404 + 2390116 = 15898^2 + 1546^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18734 + ... + 29346.

Almost surely, 2^255136520 is an apocalyptic number.

255136520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255136520 is an abundant number, since it is smaller than the sum of its proper divisors (319930000).

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

255136520 is a wasteful number, since it uses less digits than its factorization.

255136520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11225 (or 11221 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 255136520 is about 15972.9934577085. The cubic root of 255136520 is about 634.2457160728.

The spelling of 255136520 in words is "two hundred fifty-five million, one hundred thirty-six thousand, five hundred twenty".