1231331232 has 48 divisors (see below), whose sum is σ = 3253975200. Its totient is φ = 407684352.

The previous prime is 1231331221. The next prime is 1231331263. The reversal of 1231331232 is 2321331321.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1231331199 and 1231331208.

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, 28738 + ... + 57345.

It is an arithmetic number, because the mean of its divisors is an integer number (67791150).

Almost surely, 2^1231331232 is an apocalyptic number.

1231331232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231331232 is an abundant number, since it is smaller than the sum of its proper divisors (2022643968).

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

1231331232 is a wasteful number, since it uses less digits than its factorization.

1231331232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86245 (or 86237 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 1231331232 is about 35090.3296080273. The cubic root of 1231331232 is about 1071.8276714896.

Adding to 1231331232 its reverse (2321331321), we get a palindrome (3552662553).

The spelling of 1231331232 in words is "one billion, two hundred thirty-one million, three hundred thirty-one thousand, two hundred thirty-two".