31712314661 has 2 divisors, whose sum is σ = 31712314662. Its totient is φ = 31712314660.

The previous prime is 31712314597. The next prime is 31712314687. The reversal of 31712314661 is 16641321713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29183230561 + 2529084100 = 170831^2 + 50290^2 .

It is a cyclic number.

It is not a de Polignac number, because 31712314661 - 2⁶ = 31712314597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31712314561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15856157330 + 15856157331.

It is an arithmetic number, because the mean of its divisors is an integer number (15856157331).

Almost surely, 2^31712314661 is an apocalyptic number.

It is an amenable number.

31712314661 is a deficient number, since it is larger than the sum of its proper divisors (1).

31712314661 is an equidigital number, since it uses as much as digits as its factorization.

31712314661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The spelling of 31712314661 in words is "thirty-one billion, seven hundred twelve million, three hundred fourteen thousand, six hundred sixty-one".