31213431213 has 64 divisors (see below), whose sum is σ = 46198563840. Its totient is φ = 18661708800.

The previous prime is 31213431203. The next prime is 31213431217.

31213431213 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31213431213 - 2²¹ = 31211334061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213431217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54664218 + ... + 54664788.

It is an arithmetic number, because the mean of its divisors is an integer number (721852560).

Almost surely, 2^31213431213 is an apocalyptic number.

It is an amenable number.

31213431213 is a deficient number, since it is larger than the sum of its proper divisors (14985132627).

31213431213 is a wasteful number, since it uses less digits than its factorization.

31213431213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178.

The product of its digits is 1296, while the sum is 24.

The spelling of 31213431213 in words is "thirty-one billion, two hundred thirteen million, four hundred thirty-one thousand, two hundred thirteen".