265582591 has 2 divisors, whose sum is σ = 265582592. Its totient is φ = 265582590.

The previous prime is 265582553. The next prime is 265582621. The reversal of 265582591 is 195285562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265582591 - 2⁷ = 265582463 is a prime.

It is a super-2 number, since 2×265582591² = 141068225284546562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265582091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132791295 + 132791296.

It is an arithmetic number, because the mean of its divisors is an integer number (132791296).

Almost surely, 2^265582591 is an apocalyptic number.

265582591 is a deficient number, since it is larger than the sum of its proper divisors (1).

265582591 is an equidigital number, since it uses as much as digits as its factorization.

265582591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 43.

The square root of 265582591 is about 16296.7049123435. The cubic root of 265582591 is about 642.7861854968.

The spelling of 265582591 in words is "two hundred sixty-five million, five hundred eighty-two thousand, five hundred ninety-one".