2131870538 has 32 divisors (see below), whose sum is σ = 3780393600. Its totient is φ = 901121760.

The previous prime is 2131870487. The next prime is 2131870549. The reversal of 2131870538 is 8350781312.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28793 + ... + 71363.

It is an arithmetic number, because the mean of its divisors is an integer number (118137300).

Almost surely, 2^2131870538 is an apocalyptic number.

2131870538 is a deficient number, since it is larger than the sum of its proper divisors (1648523062).

2131870538 is an equidigital number, since it uses as much as digits as its factorization.

2131870538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42667 (or 42653 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 2131870538 is about 46172.1835957538. The cubic root of 2131870538 is about 1287.0248802471.

The spelling of 2131870538 in words is "two billion, one hundred thirty-one million, eight hundred seventy thousand, five hundred thirty-eight".