231031332 has 48 divisors (see below), whose sum is σ = 684539520. Its totient is φ = 66008736.

The previous prime is 231031321. The next prime is 231031363. The reversal of 231031332 is 233130132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152043 + ... + 153554.

It is an arithmetic number, because the mean of its divisors is an integer number (14261240).

Almost surely, 2^231031332 is an apocalyptic number.

It is an amenable number.

231031332 is an abundant number, since it is smaller than the sum of its proper divisors (453508188).

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

231031332 is a wasteful number, since it uses less digits than its factorization.

231031332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305617 (or 305609 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 231031332 is about 15199.7148657467. The cubic root of 231031332 is about 613.6069839312.

Adding to 231031332 its reverse (233130132), we get a palindrome (464161464).

The spelling of 231031332 in words is "two hundred thirty-one million, thirty-one thousand, three hundred thirty-two".