31132011213 has 24 divisors (see below), whose sum is σ = 45763885440. Its totient is φ = 20388067200.

The previous prime is 31132011173. The next prime is 31132011217. The reversal of 31132011213 is 31211023113.

31132011213 is a `hidden beast` number, since 311 + 320 + 11 + 21 + 3 = 666.

It is not a de Polignac number, because 31132011213 - 2⁶ = 31132011149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132011217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 735013 + ... + 776213.

It is an arithmetic number, because the mean of its divisors is an integer number (1906828560).

Almost surely, 2^31132011213 is an apocalyptic number.

It is an amenable number.

31132011213 is a deficient number, since it is larger than the sum of its proper divisors (14631874227).

31132011213 is a wasteful number, since it uses less digits than its factorization.

31132011213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42689 (or 42686 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31132011213 its reverse (31211023113), we get a palindrome (62343034326).

The spelling of 31132011213 in words is "thirty-one billion, one hundred thirty-two million, eleven thousand, two hundred thirteen".