2164255625 has 20 divisors (see below), whose sum is σ = 3090810624. Its totient is φ = 1484058000.

The previous prime is 2164255619. The next prime is 2164255651. The reversal of 2164255625 is 5265524612.

It is a happy number.

It is not a de Polignac number, because 2164255625 - 2⁸ = 2164255369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 242969 + ... + 251718.

Almost surely, 2^2164255625 is an apocalyptic number.

2164255625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2164255625 is a deficient number, since it is larger than the sum of its proper divisors (926554999).

2164255625 is an frugal number, since it uses more digits than its factorization.

2164255625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494714 (or 494699 counting only the distinct ones).

The product of its digits is 144000, while the sum is 38.

The square root of 2164255625 is about 46521.5608616048. The cubic root of 2164255625 is about 1293.5091891564.

The spelling of 2164255625 in words is "two billion, one hundred sixty-four million, two hundred fifty-five thousand, six hundred twenty-five".