31170407161 has 2 divisors, whose sum is σ = 31170407162. Its totient is φ = 31170407160.

The previous prime is 31170407129. The next prime is 31170407173. The reversal of 31170407161 is 16170407113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22184315136 + 8986092025 = 148944^2 + 94795^2 .

It is a cyclic number.

It is not a de Polignac number, because 31170407161 - 2⁵ = 31170407129 is a prime.

It is not a weakly prime, because it can be changed into another prime (31170407101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15585203580 + 15585203581.

It is an arithmetic number, because the mean of its divisors is an integer number (15585203581).

Almost surely, 2^31170407161 is an apocalyptic number.

It is an amenable number.

31170407161 is a deficient number, since it is larger than the sum of its proper divisors (1).

31170407161 is an equidigital number, since it uses as much as digits as its factorization.

31170407161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 31170407161 in words is "thirty-one billion, one hundred seventy million, four hundred seven thousand, one hundred sixty-one".