231031532 has 6 divisors (see below), whose sum is σ = 404305188. Its totient is φ = 115515764.

The previous prime is 231031531. The next prime is 231031543. The reversal of 231031532 is 235130132.

231031532 is digitally balanced in base 2 and base 3, because in such bases 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 (231031531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28878938 + ... + 28878945.

It is an arithmetic number, because the mean of its divisors is an integer number (67384198).

Almost surely, 2^231031532 is an apocalyptic number.

It is an amenable number.

231031532 is a deficient number, since it is larger than the sum of its proper divisors (173273656).

231031532 is a wasteful number, since it uses less digits than its factorization.

231031532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57757887 (or 57757885 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 231031532 is about 15199.7214448160. The cubic root of 231031532 is about 613.6071609943.

Adding to 231031532 its reverse (235130132), we get a palindrome (466161664).

The spelling of 231031532 in words is "two hundred thirty-one million, thirty-one thousand, five hundred thirty-two".