163165225 has 12 divisors (see below), whose sum is σ = 202805596. Its totient is φ = 130222080.

The previous prime is 163165193. The next prime is 163165229. The reversal of 163165225 is 522561361.

163165225 = 385² + 386² + ... + 817².

163165225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 21650409 + 141514816 = 4653^2 + 11896^2 .

It is not a de Polignac number, because 163165225 - 2⁵ = 163165193 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163165229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3289 + ... + 18361.

Almost surely, 2^163165225 is an apocalyptic number.

It is an amenable number.

163165225 is a deficient number, since it is larger than the sum of its proper divisors (39640371).

163165225 is a wasteful number, since it uses less digits than its factorization.

163165225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15516 (or 15511 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 163165225 is about 12773.6144062673. The cubic root of 163165225 is about 546.4400655042.

The spelling of 163165225 in words is "one hundred sixty-three million, one hundred sixty-five thousand, two hundred twenty-five".