231520132 has 12 divisors (see below), whose sum is σ = 411802636. Its totient is φ = 113862240.

The previous prime is 231520129. The next prime is 231520171. The reversal of 231520132 is 231025132.

It can be written as a sum of positive squares in 2 ways, for example, as 100280196 + 131239936 = 10014^2 + 11456^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474183 + ... + 474670.

Almost surely, 2^231520132 is an apocalyptic number.

It is an amenable number.

231520132 is a deficient number, since it is larger than the sum of its proper divisors (180282504).

231520132 is a wasteful number, since it uses less digits than its factorization.

231520132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948918 (or 948916 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 231520132 is about 15215.7856188894. The cubic root of 231520132 is about 614.0394214062.

Adding to 231520132 its reverse (231025132), we get a palindrome (462545264).

The spelling of 231520132 in words is "two hundred thirty-one million, five hundred twenty thousand, one hundred thirty-two".