2151931044 has 48 divisors (see below), whose sum is σ = 5144851712. Its totient is φ = 699687072.

The previous prime is 2151931021. The next prime is 2151931057. The reversal of 2151931044 is 4401391512.

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, 453267 + ... + 457989.

Almost surely, 2^2151931044 is an apocalyptic number.

It is an amenable number.

2151931044 is an abundant number, since it is smaller than the sum of its proper divisors (2992920668).

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

2151931044 is a wasteful number, since it uses less digits than its factorization.

2151931044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5656 (or 5654 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 2151931044 is about 46388.9107869542. The cubic root of 2151931044 is about 1291.0491723042.

The spelling of 2151931044 in words is "two billion, one hundred fifty-one million, nine hundred thirty-one thousand, forty-four".