265431329 has 2 divisors, whose sum is σ = 265431330. Its totient is φ = 265431328.

The previous prime is 265431323. The next prime is 265431343. The reversal of 265431329 is 923134562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173712400 + 91718929 = 13180^2 + 9577^2 .

It is a cyclic number.

It is not a de Polignac number, because 265431329 - 2²⁰ = 264382753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (265431323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132715664 + 132715665.

It is an arithmetic number, because the mean of its divisors is an integer number (132715665).

Almost surely, 2^265431329 is an apocalyptic number.

It is an amenable number.

265431329 is a deficient number, since it is larger than the sum of its proper divisors (1).

265431329 is an equidigital number, since it uses as much as digits as its factorization.

265431329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 265431329 is about 16292.0633745392. The cubic root of 265431329 is about 642.6641298199.

It can be divided in two parts, 26543 and 1329, that added together give a palindrome (27872).

The spelling of 265431329 in words is "two hundred sixty-five million, four hundred thirty-one thousand, three hundred twenty-nine".