255724531 has 2 divisors, whose sum is σ = 255724532. Its totient is φ = 255724530.

The previous prime is 255724507. The next prime is 255724541. The reversal of 255724531 is 135427552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255724531 - 2⁹ = 255724019 is a prime.

It is a super-2 number, since 2×255724531² = 130790071510339922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255724541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127862265 + 127862266.

It is an arithmetic number, because the mean of its divisors is an integer number (127862266).

Almost surely, 2^255724531 is an apocalyptic number.

255724531 is a deficient number, since it is larger than the sum of its proper divisors (1).

255724531 is an equidigital number, since it uses as much as digits as its factorization.

255724531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 34.

The square root of 255724531 is about 15991.3892767327. The cubic root of 255724531 is about 634.7325891626.

It can be divided in two parts, 25572 and 4531, that added together give a palindrome (30103).

The spelling of 255724531 in words is "two hundred fifty-five million, seven hundred twenty-four thousand, five hundred thirty-one".