31123132 has 12 divisors (see below), whose sum is σ = 56222656. Its totient is φ = 15059520.

The previous prime is 31123123. The next prime is 31123139. The reversal of 31123132 is 23132113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125373 + ... + 125620.

Almost surely, 2^31123132 is an apocalyptic number.

It is an amenable number.

31123132 is a deficient number, since it is larger than the sum of its proper divisors (25099524).

31123132 is a wasteful number, since it uses less digits than its factorization.

31123132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251028 (or 251026 counting only the distinct ones).

The product of its digits is 108, while the sum is 16.

The square root of 31123132 is about 5578.8109844303. The cubic root of 31123132 is about 314.5534345730.

Adding to 31123132 its reverse (23132113), we get a palindrome (54255245).

The spelling of 31123132 in words is "thirty-one million, one hundred twenty-three thousand, one hundred thirty-two".