231715252 has 12 divisors (see below), whose sum is σ = 409222660. Its totient is φ = 114794496.

The previous prime is 231715247. The next prime is 231715259. The reversal of 231715252 is 252517132.

It can be written as a sum of positive squares in 2 ways, for example, as 211877136 + 19838116 = 14556^2 + 4454^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 231715252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231715259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265293 + ... + 266164.

Almost surely, 2^231715252 is an apocalyptic number.

It is an amenable number.

231715252 is a deficient number, since it is larger than the sum of its proper divisors (177507408).

231715252 is a wasteful number, since it uses less digits than its factorization.

231715252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531570 (or 531568 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 231715252 is about 15222.1960307966. The cubic root of 231715252 is about 614.2118725426.

The spelling of 231715252 in words is "two hundred thirty-one million, seven hundred fifteen thousand, two hundred fifty-two".