265157881 has 2 divisors, whose sum is σ = 265157882. Its totient is φ = 265157880.

The previous prime is 265157861. The next prime is 265157897. The reversal of 265157881 is 188751562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235346281 + 29811600 = 15341^2 + 5460^2 .

It is a cyclic number.

It is not a de Polignac number, because 265157881 - 2¹¹ = 265155833 is a prime.

It is a super-2 number, since 2×265157881² = 140617403712820322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (265157801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132578940 + 132578941.

It is an arithmetic number, because the mean of its divisors is an integer number (132578941).

Almost surely, 2^265157881 is an apocalyptic number.

It is an amenable number.

265157881 is a deficient number, since it is larger than the sum of its proper divisors (1).

265157881 is an equidigital number, since it uses as much as digits as its factorization.

265157881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 43.

The square root of 265157881 is about 16283.6691504096. The cubic root of 265157881 is about 642.4433626083.

The spelling of 265157881 in words is "two hundred sixty-five million, one hundred fifty-seven thousand, eight hundred eighty-one".