31912071083 has 2 divisors, whose sum is σ = 31912071084. Its totient is φ = 31912071082.

The previous prime is 31912071017. The next prime is 31912071137. The reversal of 31912071083 is 38017021913.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31912071083 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31912071013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15956035541 + 15956035542.

It is an arithmetic number, because the mean of its divisors is an integer number (15956035542).

Almost surely, 2^31912071083 is an apocalyptic number.

31912071083 is a deficient number, since it is larger than the sum of its proper divisors (1).

31912071083 is an equidigital number, since it uses as much as digits as its factorization.

31912071083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

Adding to 31912071083 its reverse (38017021913), we get a palindrome (69929092996).

The spelling of 31912071083 in words is "thirty-one billion, nine hundred twelve million, seventy-one thousand, eighty-three".