255702591 has 6 divisors (see below), whose sum is σ = 369348200. Its totient is φ = 170468388.

The previous prime is 255702511. The next prime is 255702617. The reversal of 255702591 is 195207552.

It is not a de Polignac number, because 255702591 - 2¹⁸ = 255440447 is a prime.

It is a super-2 number, since 2×255702591² = 130767630088226562, 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 (255702511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14205691 + ... + 14205708.

Almost surely, 2^255702591 is an apocalyptic number.

255702591 is a deficient number, since it is larger than the sum of its proper divisors (113645609).

255702591 is a wasteful number, since it uses less digits than its factorization.

255702591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28411405 (or 28411402 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 255702591 is about 15990.7032678366. The cubic root of 255702591 is about 634.7144362551.

The spelling of 255702591 in words is "two hundred fifty-five million, seven hundred two thousand, five hundred ninety-one".