231012252 has 36 divisors (see below), whose sum is σ = 618299136. Its totient is φ = 72474240.

The previous prime is 231012233. The next prime is 231012283. The reversal of 231012252 is 252210132.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×231012252² = 106733321148223008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 188124 + ... + 189347.

It is an arithmetic number, because the mean of its divisors is an integer number (17174976).

Almost surely, 2^231012252 is an apocalyptic number.

It is an amenable number.

231012252 is an abundant number, since it is smaller than the sum of its proper divisors (387286884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231012252 is a wasteful number, since it uses less digits than its factorization.

231012252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377498 (or 377493 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 231012252 is about 15199.0872094347. The cubic root of 231012252 is about 613.5900916430.

Adding to 231012252 its reverse (252210132), we get a palindrome (483222384).

The spelling of 231012252 in words is "two hundred thirty-one million, twelve thousand, two hundred fifty-two".