265157591 has 2 divisors, whose sum is σ = 265157592. Its totient is φ = 265157590.

The previous prime is 265157567. The next prime is 265157603. The reversal of 265157591 is 195751562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265157591 - 2¹⁴ = 265141207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265157561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132578795 + 132578796.

It is an arithmetic number, because the mean of its divisors is an integer number (132578796).

Almost surely, 2^265157591 is an apocalyptic number.

265157591 is a deficient number, since it is larger than the sum of its proper divisors (1).

265157591 is an equidigital number, since it uses as much as digits as its factorization.

265157591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94500, while the sum is 41.

The square root of 265157591 is about 16283.6602457801. The cubic root of 265157591 is about 642.4431283973.

The spelling of 265157591 in words is "two hundred sixty-five million, one hundred fifty-seven thousand, five hundred ninety-one".