31542105697 has 2 divisors, whose sum is σ = 31542105698. Its totient is φ = 31542105696.

The previous prime is 31542105653. The next prime is 31542105757. The reversal of 31542105697 is 79650124513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31204869201 + 337236496 = 176649^2 + 18364^2 .

It is a cyclic number.

It is not a de Polignac number, because 31542105697 - 2¹⁵ = 31542072929 is a prime.

It is not a weakly prime, because it can be changed into another prime (31542105797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771052848 + 15771052849.

It is an arithmetic number, because the mean of its divisors is an integer number (15771052849).

Almost surely, 2^31542105697 is an apocalyptic number.

It is an amenable number.

31542105697 is a deficient number, since it is larger than the sum of its proper divisors (1).

31542105697 is an equidigital number, since it uses as much as digits as its factorization.

31542105697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 31542105697 in words is "thirty-one billion, five hundred forty-two million, one hundred five thousand, six hundred ninety-seven".