255712591 has 2 divisors, whose sum is σ = 255712592. Its totient is φ = 255712590.

The previous prime is 255712579. The next prime is 255712627. The reversal of 255712591 is 195217552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255712591 - 2¹⁹ = 255188303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255712591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255752591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127856295 + 127856296.

It is an arithmetic number, because the mean of its divisors is an integer number (127856296).

Almost surely, 2^255712591 is an apocalyptic number.

255712591 is a deficient number, since it is larger than the sum of its proper divisors (1).

255712591 is an equidigital number, since it uses as much as digits as its factorization.

255712591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 37.

The square root of 255712591 is about 15991.0159464619. The cubic root of 255712591 is about 634.7227102706.

The spelling of 255712591 in words is "two hundred fifty-five million, seven hundred twelve thousand, five hundred ninety-one".