31610075137 has 4 divisors (see below), whose sum is σ = 31727584980. Its totient is φ = 31492565296.

The previous prime is 31610075117. The next prime is 31610075149. The reversal of 31610075137 is 73157001613.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1286728641 + 30323346496 = 35871^2 + 174136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31610075137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31610075117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58754518 + ... + 58755055.

It is an arithmetic number, because the mean of its divisors is an integer number (7931896245).

Almost surely, 2^31610075137 is an apocalyptic number.

It is an amenable number.

31610075137 is a deficient number, since it is larger than the sum of its proper divisors (117509843).

31610075137 is a wasteful number, since it uses less digits than its factorization.

31610075137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117509842.

The product of its (nonzero) digits is 13230, while the sum is 34.

The spelling of 31610075137 in words is "thirty-one billion, six hundred ten million, seventy-five thousand, one hundred thirty-seven".