2162172555 has 16 divisors (see below), whose sum is σ = 3843862560. Its totient is φ = 1153158624.

The previous prime is 2162172553. The next prime is 2162172559. The reversal of 2162172555 is 5552712612.

2162172555 is a `hidden beast` number, since 2 + 1 + 621 + 7 + 25 + 5 + 5 = 666.

It is not a de Polignac number, because 2162172555 - 2¹ = 2162172553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2162172553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8007912 + ... + 8008181.

It is an arithmetic number, because the mean of its divisors is an integer number (240241410).

Almost surely, 2^2162172555 is an apocalyptic number.

2162172555 is a deficient number, since it is larger than the sum of its proper divisors (1681690005).

2162172555 is a wasteful number, since it uses less digits than its factorization.

2162172555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16016107 (or 16016101 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 2162172555 is about 46499.1672506078. The cubic root of 2162172555 is about 1293.0940602651.

The spelling of 2162172555 in words is "two billion, one hundred sixty-two million, one hundred seventy-two thousand, five hundred fifty-five".