31390522297 has 2 divisors, whose sum is σ = 31390522298. Its totient is φ = 31390522296.

The previous prime is 31390522271. The next prime is 31390522333. The reversal of 31390522297 is 79222509313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18153789696 + 13236732601 = 134736^2 + 115051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31390522297 is a prime.

It is not a weakly prime, because it can be changed into another prime (31390520297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15695261148 + 15695261149.

It is an arithmetic number, because the mean of its divisors is an integer number (15695261149).

Almost surely, 2^31390522297 is an apocalyptic number.

It is an amenable number.

31390522297 is a deficient number, since it is larger than the sum of its proper divisors (1).

31390522297 is an equidigital number, since it uses as much as digits as its factorization.

31390522297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 43.

The spelling of 31390522297 in words is "thirty-one billion, three hundred ninety million, five hundred twenty-two thousand, two hundred ninety-seven".