2155124565 has 96 divisors (see below), whose sum is σ = 4188412800. Its totient is φ = 1016271360.

The previous prime is 2155124551. The next prime is 2155124591. The reversal of 2155124565 is 5654215512.

2155124565 is a `hidden beast` number, since 2 + 1 + 551 + 2 + 45 + 65 = 666.

It is not a de Polignac number, because 2155124565 - 2⁷ = 2155124437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3183007 + ... + 3183683.

It is an arithmetic number, because the mean of its divisors is an integer number (43629300).

Almost surely, 2^2155124565 is an apocalyptic number.

It is an amenable number.

2155124565 is a deficient number, since it is larger than the sum of its proper divisors (2033288235).

2155124565 is a wasteful number, since it uses less digits than its factorization.

2155124565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 864 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 2155124565 is about 46423.3191941292. The cubic root of 2155124565 is about 1291.6875066958.

The spelling of 2155124565 in words is "two billion, one hundred fifty-five million, one hundred twenty-four thousand, five hundred sixty-five".