31655055613 has 2 divisors, whose sum is σ = 31655055614. Its totient is φ = 31655055612.

The previous prime is 31655055571. The next prime is 31655055623.

It is a happy number.

31655055613 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16541303769 + 15113751844 = 128613^2 + 122938^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31655055613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31655055623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15827527806 + 15827527807.

It is an arithmetic number, because the mean of its divisors is an integer number (15827527807).

Almost surely, 2^31655055613 is an apocalyptic number.

It is an amenable number.

31655055613 is a deficient number, since it is larger than the sum of its proper divisors (1).

31655055613 is an equidigital number, since it uses as much as digits as its factorization.

31655055613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 202500, while the sum is 40.

The spelling of 31655055613 in words is "thirty-one billion, six hundred fifty-five million, fifty-five thousand, six hundred thirteen".