255756513 has 4 divisors (see below), whose sum is σ = 341008688. Its totient is φ = 170504340.

The previous prime is 255756497. The next prime is 255756547. The reversal of 255756513 is 315657552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255756513 - 2⁴ = 255756497 is a prime.

It is a super-2 number, since 2×255756513² = 130822787883838338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255756583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42626083 + ... + 42626088.

It is an arithmetic number, because the mean of its divisors is an integer number (85252172).

Almost surely, 2^255756513 is an apocalyptic number.

It is an amenable number.

255756513 is a deficient number, since it is larger than the sum of its proper divisors (85252175).

255756513 is an equidigital number, since it uses as much as digits as its factorization.

255756513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85252174.

The product of its digits is 157500, while the sum is 39.

The square root of 255756513 is about 15992.3892211264. The cubic root of 255756513 is about 634.7590488474.

The spelling of 255756513 in words is "two hundred fifty-five million, seven hundred fifty-six thousand, five hundred thirteen".