31213430044319 has 2 divisors, whose sum is σ = 31213430044320. Its totient is φ = 31213430044318.

The previous prime is 31213430044249. The next prime is 31213430044327. The reversal of 31213430044319 is 91344003431213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31213430044319 is a prime.

It is a super-2 number, since 2×31213430044319² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31213430044219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606715022159 + 15606715022160.

It is an arithmetic number, because the mean of its divisors is an integer number (15606715022160).

Almost surely, 2^{31213430044319} is an apocalyptic number.

31213430044319 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213430044319 is an equidigital number, since it uses as much as digits as its factorization.

31213430044319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 31213430044319 in words is "thirty-one trillion, two hundred thirteen billion, four hundred thirty million, forty-four thousand, three hundred nineteen".