231513324 has 24 divisors (see below), whose sum is σ = 617369088. Its totient is φ = 66146640.

The previous prime is 231513313. The next prime is 231513353. The reversal of 231513324 is 423315132.

231513324 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231513294 and 231513303.

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, 1377972 + ... + 1378139.

It is an arithmetic number, because the mean of its divisors is an integer number (25723712).

Almost surely, 2^231513324 is an apocalyptic number.

It is an amenable number.

231513324 is an abundant number, since it is smaller than the sum of its proper divisors (385855764).

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

231513324 is a wasteful number, since it uses less digits than its factorization.

231513324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756125 (or 2756123 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 231513324 is about 15215.5619022105. The cubic root of 231513324 is about 614.0334026044.

Adding to 231513324 its reverse (423315132), we get a palindrome (654828456).

The spelling of 231513324 in words is "two hundred thirty-one million, five hundred thirteen thousand, three hundred twenty-four".