31427084137 has 12 divisors (see below), whose sum is σ = 32050709956. Its totient is φ = 30815246880.

The previous prime is 31427084131. The next prime is 31427084147. The reversal of 31427084137 is 73148072413.

It can be written as a sum of positive squares in 2 ways, for example, as 10770495961 + 20656588176 = 103781^2 + 143724^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31427084137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31427084137.

It is not an unprimeable number, because it can be changed into a prime (31427084131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1370587 + ... + 1393327.

Almost surely, 2^31427084137 is an apocalyptic number.

It is an amenable number.

31427084137 is a deficient number, since it is larger than the sum of its proper divisors (623625819).

31427084137 is an equidigital number, since it uses as much as digits as its factorization.

31427084137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23256 (or 23197 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 31427084137 in words is "thirty-one billion, four hundred twenty-seven million, eighty-four thousand, one hundred thirty-seven".