31131522045 has 64 divisors (see below), whose sum is σ = 59630941440. Its totient is φ = 15318906624.

The previous prime is 31131522031. The next prime is 31131522091. The reversal of 31131522045 is 54022513113.

31131522045 is a `hidden beast` number, since 3 + 1 + 131 + 522 + 0 + 4 + 5 = 666.

It is not a de Polignac number, because 31131522045 - 2⁵ = 31131522013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6240042 + ... + 6245028.

It is an arithmetic number, because the mean of its divisors is an integer number (931733460).

Almost surely, 2^31131522045 is an apocalyptic number.

It is an amenable number.

31131522045 is a deficient number, since it is larger than the sum of its proper divisors (28499419395).

31131522045 is a wasteful number, since it uses less digits than its factorization.

31131522045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8571 (or 8565 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 31131522045 in words is "thirty-one billion, one hundred thirty-one million, five hundred twenty-two thousand, forty-five".