31612204291 has 2 divisors, whose sum is σ = 31612204292. Its totient is φ = 31612204290.

The previous prime is 31612204279. The next prime is 31612204297. The reversal of 31612204291 is 19240221613.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31612204291 is a prime.

It is not a weakly prime, because it can be changed into another prime (31612204297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15806102145 + 15806102146.

It is an arithmetic number, because the mean of its divisors is an integer number (15806102146).

Almost surely, 2^31612204291 is an apocalyptic number.

31612204291 is a deficient number, since it is larger than the sum of its proper divisors (1).

31612204291 is an equidigital number, since it uses as much as digits as its factorization.

31612204291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 31612204291 in words is "thirty-one billion, six hundred twelve million, two hundred four thousand, two hundred ninety-one".