31923455518139 has 2 divisors, whose sum is σ = 31923455518140. Its totient is φ = 31923455518138.

The previous prime is 31923455518133. The next prime is 31923455518211. The reversal of 31923455518139 is 93181555432913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31923455518139 - 2²⁰ = 31923454469563 is a prime.

It is not a weakly prime, because it can be changed into another prime (31923455518133) 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, 15961727759069 + 15961727759070.

It is an arithmetic number, because the mean of its divisors is an integer number (15961727759070).

Almost surely, 2^{31923455518139} is an apocalyptic number.

31923455518139 is a deficient number, since it is larger than the sum of its proper divisors (1).

31923455518139 is an equidigital number, since it uses as much as digits as its factorization.

31923455518139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496000, while the sum is 59.

The spelling of 31923455518139 in words is "thirty-one trillion, nine hundred twenty-three billion, four hundred fifty-five million, five hundred eighteen thousand, one hundred thirty-nine".