265202591 has 2 divisors, whose sum is σ = 265202592. Its totient is φ = 265202590.

The previous prime is 265202579. The next prime is 265202621. The reversal of 265202591 is 195202562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265202591 - 2¹⁸ = 264940447 is a prime.

It is a super-2 number, since 2×265202591² = 140664828546226562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265202521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132601295 + 132601296.

It is an arithmetic number, because the mean of its divisors is an integer number (132601296).

Almost surely, 2^265202591 is an apocalyptic number.

265202591 is a deficient number, since it is larger than the sum of its proper divisors (1).

265202591 is an equidigital number, since it uses as much as digits as its factorization.

265202591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 265202591 is about 16285.0419403820. The cubic root of 265202591 is about 642.4794694344.

The spelling of 265202591 in words is "two hundred sixty-five million, two hundred two thousand, five hundred ninety-one".