231215052 has 24 divisors (see below), whose sum is σ = 540235696. Its totient is φ = 76966848.

The previous prime is 231215029. The next prime is 231215059. The reversal of 231215052 is 250512132.

231215052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231215059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3643 + ... + 21810.

Almost surely, 2^231215052 is an apocalyptic number.

It is an amenable number.

231215052 is an abundant number, since it is smaller than the sum of its proper divisors (309020644).

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

231215052 is a wasteful number, since it uses less digits than its factorization.

231215052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26217 (or 26215 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 231215052 is about 15205.7571991664. The cubic root of 231215052 is about 613.7695910333.

Adding to 231215052 its reverse (250512132), we get a palindrome (481727184).

The spelling of 231215052 in words is "two hundred thirty-one million, two hundred fifteen thousand, fifty-two".