2157999832 has 16 divisors (see below), whose sum is σ = 4063183200. Its totient is φ = 1074484320.

The previous prime is 2157999827. The next prime is 2157999889. The reversal of 2157999832 is 2389997512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562419 + ... + 566242.

It is an arithmetic number, because the mean of its divisors is an integer number (253948950).

Almost surely, 2^2157999832 is an apocalyptic number.

It is an amenable number.

2157999832 is a deficient number, since it is larger than the sum of its proper divisors (1905183368).

2157999832 is a wasteful number, since it uses less digits than its factorization.

2157999832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128906 (or 1128902 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 55.

The square root of 2157999832 is about 46454.2767891181. The cubic root of 2157999832 is about 1292.2616878959.

The spelling of 2157999832 in words is "two billion, one hundred fifty-seven million, nine hundred ninety-nine thousand, eight hundred thirty-two".