31213044632563 has 2 divisors, whose sum is σ = 31213044632564. Its totient is φ = 31213044632562.

The previous prime is 31213044632537. The next prime is 31213044632639. The reversal of 31213044632563 is 36523644031213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31213044632563 - 2²⁹ = 31212507761651 is a prime.

It is not a weakly prime, because it can be changed into another prime (31213044732563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606522316281 + 15606522316282.

It is an arithmetic number, because the mean of its divisors is an integer number (15606522316282).

Almost surely, 2^{31213044632563} is an apocalyptic number.

31213044632563 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213044632563 is an equidigital number, since it uses as much as digits as its factorization.

31213044632563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 43.

Adding to 31213044632563 its reverse (36523644031213), we get a palindrome (67736688663776).

The spelling of 31213044632563 in words is "thirty-one trillion, two hundred thirteen billion, forty-four million, six hundred thirty-two thousand, five hundred sixty-three".