2159921232 has 120 divisors (see below), whose sum is σ = 6922521216. Its totient is φ = 615852288.

The previous prime is 2159921209. The next prime is 2159921263. The reversal of 2159921232 is 2321299512.

2159921232 is a `hidden beast` number, since 21 + 599 + 2 + 12 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 559533 + ... + 563379.

Almost surely, 2^2159921232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2159921232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3461260608).

2159921232 is an abundant number, since it is smaller than the sum of its proper divisors (4762599984).

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

2159921232 is a wasteful number, since it uses less digits than its factorization.

2159921232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425 (or 4416 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 2159921232 is about 46474.9527380072. The cubic root of 2159921232 is about 1292.6451008178.

The spelling of 2159921232 in words is "two billion, one hundred fifty-nine million, nine hundred twenty-one thousand, two hundred thirty-two".