2154502215 has 24 divisors (see below), whose sum is σ = 3757394160. Its totient is φ = 1142014464.

The previous prime is 2154502177. The next prime is 2154502223. The reversal of 2154502215 is 5122054512.

2154502215 is a `hidden beast` number, since 2 + 154 + 502 + 2 + 1 + 5 = 666.

It is not a de Polignac number, because 2154502215 - 2⁹ = 2154501703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139530 + ... + 154199.

It is an arithmetic number, because the mean of its divisors is an integer number (156558090).

Almost surely, 2^2154502215 is an apocalyptic number.

2154502215 is a deficient number, since it is larger than the sum of its proper divisors (1602891945).

2154502215 is a wasteful number, since it uses less digits than its factorization.

2154502215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293903 (or 293900 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 2154502215 is about 46416.6157210971. The cubic root of 2154502215 is about 1291.5631582589.

Adding to 2154502215 its reverse (5122054512), we get a palindrome (7276556727).

The spelling of 2154502215 in words is "two billion, one hundred fifty-four million, five hundred two thousand, two hundred fifteen".