31213210037 has 2 divisors, whose sum is σ = 31213210038. Its totient is φ = 31213210036.

The previous prime is 31213209991. The next prime is 31213210057. The reversal of 31213210037 is 73001231213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30305935396 + 907274641 = 174086^2 + 30121^2 .

It is a cyclic number.

It is not a de Polignac number, because 31213210037 - 2³⁰ = 30139468213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31213209994 and 31213210021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31213210057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606605018 + 15606605019.

It is an arithmetic number, because the mean of its divisors is an integer number (15606605019).

Almost surely, 2^31213210037 is an apocalyptic number.

It is an amenable number.

31213210037 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213210037 is an equidigital number, since it uses as much as digits as its factorization.

31213210037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The spelling of 31213210037 in words is "thirty-one billion, two hundred thirteen million, two hundred ten thousand, thirty-seven".