163305225 has 18 divisors (see below), whose sum is σ = 292498206. Its totient is φ = 87096000.

The previous prime is 163305211. The next prime is 163305229. The reversal of 163305225 is 522503361.

163305225 is a `hidden beast` number, since 1 + 633 + 0 + 5 + 2 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 51538041 + 111767184 = 7179^2 + 10572^2 .

It is not a de Polignac number, because 163305225 - 2⁸ = 163304969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163305229) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 362676 + ... + 363125.

Almost surely, 2^163305225 is an apocalyptic number.

163305225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163305225 is a deficient number, since it is larger than the sum of its proper divisors (129192981).

163305225 is a wasteful number, since it uses less digits than its factorization.

163305225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725817 (or 725809 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 163305225 is about 12779.0932776938. The cubic root of 163305225 is about 546.5963074148.

Adding to 163305225 its reverse (522503361), we get a palindrome (685808586).

The spelling of 163305225 in words is "one hundred sixty-three million, three hundred five thousand, two hundred twenty-five".