31230400037 has 2 divisors, whose sum is σ = 31230400038. Its totient is φ = 31230400036.

The previous prime is 31230400021. The next prime is 31230400049. The reversal of 31230400037 is 73000403213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31212642241 + 17757796 = 176671^2 + 4214^2 .

It is a cyclic number.

It is not a de Polignac number, because 31230400037 - 2⁴ = 31230400021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31230399985 and 31230400021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31230400057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615200018 + 15615200019.

It is an arithmetic number, because the mean of its divisors is an integer number (15615200019).

Almost surely, 2^31230400037 is an apocalyptic number.

It is an amenable number.

31230400037 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230400037 is an equidigital number, since it uses as much as digits as its factorization.

31230400037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 23.

The spelling of 31230400037 in words is "thirty-one billion, two hundred thirty million, four hundred thousand, thirty-seven".