31396162771 has 2 divisors, whose sum is σ = 31396162772. Its totient is φ = 31396162770.

The previous prime is 31396162741. The next prime is 31396162793. The reversal of 31396162771 is 17726169313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31396162771 is a prime.

It is not a weakly prime, because it can be changed into another prime (31396162741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15698081385 + 15698081386.

It is an arithmetic number, because the mean of its divisors is an integer number (15698081386).

Almost surely, 2^31396162771 is an apocalyptic number.

31396162771 is a deficient number, since it is larger than the sum of its proper divisors (1).

31396162771 is an equidigital number, since it uses as much as digits as its factorization.

31396162771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The spelling of 31396162771 in words is "thirty-one billion, three hundred ninety-six million, one hundred sixty-two thousand, seven hundred seventy-one".