31922642617 has 2 divisors, whose sum is σ = 31922642618. Its totient is φ = 31922642616.

The previous prime is 31922642611. The next prime is 31922642623. The reversal of 31922642617 is 71624622913.

It is a balanced prime because it is at equal distance from previous prime (31922642611) and next prime (31922642623).

It can be written as a sum of positive squares in only one way, i.e., 25452692521 + 6469950096 = 159539^2 + 80436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31922642617 is a prime.

It is a super-3 number, since 3×31922642617³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (31922642611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15961321308 + 15961321309.

It is an arithmetic number, because the mean of its divisors is an integer number (15961321309).

Almost surely, 2^31922642617 is an apocalyptic number.

It is an amenable number.

31922642617 is a deficient number, since it is larger than the sum of its proper divisors (1).

31922642617 is an equidigital number, since it uses as much as digits as its factorization.

31922642617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The spelling of 31922642617 in words is "thirty-one billion, nine hundred twenty-two million, six hundred forty-two thousand, six hundred seventeen".