31170371157 has 20 divisors (see below), whose sum is σ = 46758000960. Its totient is φ = 20693287944.

The previous prime is 31170371147. The next prime is 31170371227. The reversal of 31170371157 is 75117307113.

It is a de Polignac number, because none of the positive numbers 2^k-31170371157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31170371117) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 785703 + ... + 824420.

It is an arithmetic number, because the mean of its divisors is an integer number (2337900048).

Almost surely, 2^31170371157 is an apocalyptic number.

It is an amenable number.

31170371157 is a deficient number, since it is larger than the sum of its proper divisors (15587629803).

31170371157 is a wasteful number, since it uses less digits than its factorization.

31170371157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610374 (or 1610365 counting only the distinct ones).

The product of its (nonzero) digits is 15435, while the sum is 36.

The spelling of 31170371157 in words is "thirty-one billion, one hundred seventy million, three hundred seventy-one thousand, one hundred fifty-seven".