313231232 has 32 divisors (see below), whose sum is σ = 627885480. Its totient is φ = 155644416.

The previous prime is 313231213. The next prime is 313231241. The reversal of 313231232 is 232132313.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×313231232² = 196227609400475648, which contains 22 as substring.

It is a congruent number.

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, 13358 + ... + 28370.

Almost surely, 2^313231232 is an apocalyptic number.

313231232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 313231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313942740).

313231232 is an abundant number, since it is smaller than the sum of its proper divisors (314654248).

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

313231232 is a wasteful number, since it uses less digits than its factorization.

313231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15190 (or 15178 counting only the distinct ones).

The product of its digits is 648, while the sum is 20.

The square root of 313231232 is about 17698.3398091459. The cubic root of 313231232 is about 679.1332902480.

Adding to 313231232 its reverse (232132313), we get a palindrome (545363545).

The spelling of 313231232 in words is "three hundred thirteen million, two hundred thirty-one thousand, two hundred thirty-two".