2157188016 has 20 divisors (see below), whose sum is σ = 5572735832. Its totient is φ = 719062656.

The previous prime is 2157188003. The next prime is 2157188017. The reversal of 2157188016 is 6108817512.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2157188017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22470661 + ... + 22470756.

Almost surely, 2^2157188016 is an apocalyptic number.

It is an amenable number.

2157188016 is an abundant number, since it is smaller than the sum of its proper divisors (3415547816).

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

2157188016 is a wasteful number, since it uses less digits than its factorization.

2157188016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44941428 (or 44941422 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 39.

The square root of 2157188016 is about 46445.5381710666. The cubic root of 2157188016 is about 1292.0996226543.

The spelling of 2157188016 in words is "two billion, one hundred fifty-seven million, one hundred eighty-eight thousand, sixteen".