31440314137 has 2 divisors, whose sum is σ = 31440314138. Its totient is φ = 31440314136.

The previous prime is 31440314107. The next prime is 31440314189. The reversal of 31440314137 is 73141304413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17828658576 + 13611655561 = 133524^2 + 116669^2 .

It is an emirp because it is prime and its reverse (73141304413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31440314137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31440314099 and 31440314108.

It is not a weakly prime, because it can be changed into another prime (31440314107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720157068 + 15720157069.

It is an arithmetic number, because the mean of its divisors is an integer number (15720157069).

Almost surely, 2^31440314137 is an apocalyptic number.

It is an amenable number.

31440314137 is a deficient number, since it is larger than the sum of its proper divisors (1).

31440314137 is an equidigital number, since it uses as much as digits as its factorization.

31440314137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The spelling of 31440314137 in words is "thirty-one billion, four hundred forty million, three hundred fourteen thousand, one hundred thirty-seven".