231520152 has 32 divisors (see below), whose sum is σ = 597473280. Its totient is φ = 74683680.

The previous prime is 231520129. The next prime is 231520171. The reversal of 231520152 is 251025132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154848 + ... + 156335.

It is an arithmetic number, because the mean of its divisors is an integer number (18671040).

Almost surely, 2^231520152 is an apocalyptic number.

It is an amenable number.

231520152 is an abundant number, since it is smaller than the sum of its proper divisors (365953128).

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

231520152 is a wasteful number, since it uses less digits than its factorization.

231520152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311223 (or 311219 counting only the distinct ones).

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

The square root of 231520152 is about 15215.7862761015. The cubic root of 231520152 is about 614.0394390876.

Adding to 231520152 its reverse (251025132), we get a palindrome (482545284).

The spelling of 231520152 in words is "two hundred thirty-one million, five hundred twenty thousand, one hundred fifty-two".