265531249 has 2 divisors, whose sum is σ = 265531250. Its totient is φ = 265531248.

The previous prime is 265531243. The next prime is 265531291. The reversal of 265531249 is 942135562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167521249 + 98010000 = 12943^2 + 9900^2 .

It is a cyclic number.

It is not a de Polignac number, because 265531249 - 2⁹ = 265530737 is a prime.

It is not a weakly prime, because it can be changed into another prime (265531243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132765624 + 132765625.

It is an arithmetic number, because the mean of its divisors is an integer number (132765625).

Almost surely, 2^265531249 is an apocalyptic number.

It is an amenable number.

265531249 is a deficient number, since it is larger than the sum of its proper divisors (1).

265531249 is an equidigital number, since it uses as much as digits as its factorization.

265531249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 265531249 is about 16295.1296097945. The cubic root of 265531249 is about 642.7447620296.

The spelling of 265531249 in words is "two hundred sixty-five million, five hundred thirty-one thousand, two hundred forty-nine".