2162172579 has 24 divisors (see below), whose sum is σ = 3357673920. Its totient is φ = 1234016784.

The previous prime is 2162172559. The next prime is 2162172581. The reversal of 2162172579 is 9752712612.

It is not a de Polignac number, because 2162172579 - 2⁷ = 2162172451 is a prime.

It is a super-2 number, since 2×2162172579² = 9349980522759022482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2162172579.

It is not an unprimeable number, because it can be changed into a prime (2162172559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117712 + ... + 134834.

It is an arithmetic number, because the mean of its divisors is an integer number (139903080).

Almost surely, 2^2162172579 is an apocalyptic number.

2162172579 is a deficient number, since it is larger than the sum of its proper divisors (1195501341).

2162172579 is a wasteful number, since it uses less digits than its factorization.

2162172579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17999 (or 17992 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 2162172579 is about 46499.1675086770. The cubic root of 2162172579 is about 1293.0940650495.

The spelling of 2162172579 in words is "two billion, one hundred sixty-two million, one hundred seventy-two thousand, five hundred seventy-nine".