31731423868601 has 2 divisors, whose sum is σ = 31731423868602. Its totient is φ = 31731423868600.

The previous prime is 31731423868541. The next prime is 31731423868609. The reversal of 31731423868601 is 10686832413713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31698037270201 + 33386598400 = 5630101^2 + 182720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31731423868601 is a prime.

It is not a weakly prime, because it can be changed into another prime (31731423868609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15865711934300 + 15865711934301.

It is an arithmetic number, because the mean of its divisors is an integer number (15865711934301).

Almost surely, 2^{31731423868601} is an apocalyptic number.

It is an amenable number.

31731423868601 is a deficient number, since it is larger than the sum of its proper divisors (1).

31731423868601 is an equidigital number, since it uses as much as digits as its factorization.

31731423868601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 31731423868601 in words is "thirty-one trillion, seven hundred thirty-one billion, four hundred twenty-three million, eight hundred sixty-eight thousand, six hundred one".