31831912097 has 2 divisors, whose sum is σ = 31831912098. Its totient is φ = 31831912096.

The previous prime is 31831912087. The next prime is 31831912103. The reversal of 31831912097 is 79021913813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31059127696 + 772784401 = 176236^2 + 27799^2 .

It is a cyclic number.

It is not a de Polignac number, because 31831912097 - 2¹⁴ = 31831895713 is a prime.

It is a super-2 number, since 2×31831912097² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31831912087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15915956048 + 15915956049.

It is an arithmetic number, because the mean of its divisors is an integer number (15915956049).

Almost surely, 2^31831912097 is an apocalyptic number.

It is an amenable number.

31831912097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31831912097 is an equidigital number, since it uses as much as digits as its factorization.

31831912097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 31831912097 in words is "thirty-one billion, eight hundred thirty-one million, nine hundred twelve thousand, ninety-seven".