31213044632638 has 64 divisors (see below), whose sum is σ = 51632516802240. Its totient is φ = 14033937484800.

The previous prime is 31213044632563. The next prime is 31213044632639. The reversal of 31213044632638 is 83623644031213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213044632639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1327694428 + ... + 1327717936.

It is an arithmetic number, because the mean of its divisors is an integer number (806758075035).

Almost surely, 2^{31213044632638} is an apocalyptic number.

31213044632638 is a deficient number, since it is larger than the sum of its proper divisors (20419472169602).

31213044632638 is a wasteful number, since it uses less digits than its factorization.

31213044632638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25213.

The product of its (nonzero) digits is 1492992, while the sum is 46.

The spelling of 31213044632638 in words is "thirty-one trillion, two hundred thirteen billion, forty-four million, six hundred thirty-two thousand, six hundred thirty-eight".