2131957880 has 64 divisors (see below), whose sum is σ = 5214313440. Its totient is φ = 779807232.

The previous prime is 2131957873. The next prime is 2131957897. The reversal of 2131957880 is 887591312.

It is a congruent number.

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, 36482 + ... + 74798.

Almost surely, 2^2131957880 is an apocalyptic number.

2131957880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131957880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2607156720).

2131957880 is an abundant number, since it is smaller than the sum of its proper divisors (3082355560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131957880 is a wasteful number, since it uses less digits than its factorization.

2131957880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38448 (or 38444 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 2131957880 is about 46173.1294152779. The cubic root of 2131957880 is about 1287.0424563287.

The spelling of 2131957880 in words is "two billion, one hundred thirty-one million, nine hundred fifty-seven thousand, eight hundred eighty".