31130694405 has 24 divisors (see below), whose sum is σ = 53969987448. Its totient is φ = 16599924096.

The previous prime is 31130694401. The next prime is 31130694431. The reversal of 31130694405 is 50449603113.

31130694405 is a `hidden beast` number, since 31 + 130 + 6 + 94 + 405 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2090916 + 31128603489 = 1446^2 + 176433^2 .

It is not a de Polignac number, because 31130694405 - 2² = 31130694401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31130694405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130694401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188719 + ... + 312851.

It is an arithmetic number, because the mean of its divisors is an integer number (2248749477).

Almost surely, 2^31130694405 is an apocalyptic number.

It is an amenable number.

31130694405 is a deficient number, since it is larger than the sum of its proper divisors (22839293043).

31130694405 is a wasteful number, since it uses less digits than its factorization.

31130694405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129717 (or 129714 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 31130694405 in words is "thirty-one billion, one hundred thirty million, six hundred ninety-four thousand, four hundred five".