2157724437 has 32 divisors (see below), whose sum is σ = 3188843520. Its totient is φ = 1286824320.

The previous prime is 2157724427. The next prime is 2157724441. The reversal of 2157724437 is 7344277512.

It is not a de Polignac number, because 2157724437 - 2⁴ = 2157724421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157724427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1490448 + ... + 1491894.

It is an arithmetic number, because the mean of its divisors is an integer number (99651360).

Almost surely, 2^2157724437 is an apocalyptic number.

It is an amenable number.

2157724437 is a deficient number, since it is larger than the sum of its proper divisors (1031119083).

2157724437 is a wasteful number, since it uses less digits than its factorization.

2157724437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153.

The product of its digits is 329280, while the sum is 42.

The square root of 2157724437 is about 46451.3125433502. The cubic root of 2157724437 is about 1292.2067145293.

The spelling of 2157724437 in words is "two billion, one hundred fifty-seven million, seven hundred twenty-four thousand, four hundred thirty-seven".