163616225 has 6 divisors (see below), whose sum is σ = 202884150. Its totient is φ = 130892960.

The previous prime is 163616209. The next prime is 163616237. The reversal of 163616225 is 522616361.

It can be written as a sum of positive squares in 3 ways, for example, as 54037201 + 109579024 = 7351^2 + 10468^2 .

It is not a de Polignac number, because 163616225 - 2⁴ = 163616209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163616191 and 163616200.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3272300 + ... + 3272349.

It is an arithmetic number, because the mean of its divisors is an integer number (33814025).

Almost surely, 2^163616225 is an apocalyptic number.

It is an amenable number.

163616225 is a deficient number, since it is larger than the sum of its proper divisors (39267925).

163616225 is an equidigital number, since it uses as much as digits as its factorization.

163616225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6544659 (or 6544654 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 163616225 is about 12791.2558023049. The cubic root of 163616225 is about 546.9430684253.

The spelling of 163616225 in words is "one hundred sixty-three million, six hundred sixteen thousand, two hundred twenty-five".