31317332 has 24 divisors (see below), whose sum is σ = 60033960. Its totient is φ = 14228480.

The previous prime is 31317313. The next prime is 31317359. The reversal of 31317332 is 23371313.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16679056 + 14638276 = 4084^2 + 3826^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31317298 and 31317307.

It is a congruent number.

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, 5969 + ... + 9912.

It is an arithmetic number, because the mean of its divisors is an integer number (2501415).

Almost surely, 2^31317332 is an apocalyptic number.

It is an amenable number.

31317332 is a deficient number, since it is larger than the sum of its proper divisors (28716628).

31317332 is a wasteful number, since it uses less digits than its factorization.

31317332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15931 (or 15929 counting only the distinct ones).

The product of its digits is 1134, while the sum is 23.

The square root of 31317332 is about 5596.1890604232. The cubic root of 31317332 is about 315.2063215383.

Adding to 31317332 its reverse (23371313), we get a palindrome (54688645).

The spelling of 31317332 in words is "thirty-one million, three hundred seventeen thousand, three hundred thirty-two".