2172360155 has 16 divisors (see below), whose sum is σ = 3136039680. Its totient is φ = 1411216992.

The previous prime is 2172360133. The next prime is 2172360187. The reversal of 2172360155 is 5510632712.

It is a cyclic number.

It is not a de Polignac number, because 2172360155 - 2⁸ = 2172359899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632689 + ... + 1634018.

It is an arithmetic number, because the mean of its divisors is an integer number (196002480).

Almost surely, 2^2172360155 is an apocalyptic number.

2172360155 is a deficient number, since it is larger than the sum of its proper divisors (963679525).

2172360155 is a wasteful number, since it uses less digits than its factorization.

2172360155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266738.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 2172360155 is about 46608.5845633613. The cubic root of 2172360155 is about 1295.1217875653.

Adding to 2172360155 its reverse (5510632712), we get a palindrome (7682992867).

The spelling of 2172360155 in words is "two billion, one hundred seventy-two million, three hundred sixty thousand, one hundred fifty-five".