2154402225 has 24 divisors (see below), whose sum is σ = 3957717920. Its totient is φ = 1149014160.

The previous prime is 2154402181. The next prime is 2154402233. The reversal of 2154402225 is 5222044512.

2154402225 is a `hidden beast` number, since 215 + 440 + 2 + 2 + 2 + 5 = 666.

It is not a de Polignac number, because 2154402225 - 2²⁰ = 2153353649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 1595179 + ... + 1596528.

Almost surely, 2^2154402225 is an apocalyptic number.

2154402225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2154402225 is a deficient number, since it is larger than the sum of its proper divisors (1803315695).

2154402225 is a wasteful number, since it uses less digits than its factorization.

2154402225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191726 (or 3191715 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 2154402225 is about 46415.5386158558. The cubic root of 2154402225 is about 1291.5431775572.

Adding to 2154402225 its reverse (5222044512), we get a palindrome (7376446737).

The spelling of 2154402225 in words is "two billion, one hundred fifty-four million, four hundred two thousand, two hundred twenty-five".