31212645179 has 2 divisors, whose sum is σ = 31212645180. Its totient is φ = 31212645178.

The previous prime is 31212645173. The next prime is 31212645229. The reversal of 31212645179 is 97154621213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212645179 is a prime.

It is not a weakly prime, because it can be changed into another prime (31212645173) 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 as a sum of consecutive naturals, namely, 15606322589 + 15606322590.

It is an arithmetic number, because the mean of its divisors is an integer number (15606322590).

Almost surely, 2^31212645179 is an apocalyptic number.

31212645179 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212645179 is an equidigital number, since it uses as much as digits as its factorization.

31212645179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The spelling of 31212645179 in words is "thirty-one billion, two hundred twelve million, six hundred forty-five thousand, one hundred seventy-nine".