163306225 has 6 divisors (see below), whose sum is σ = 202499750. Its totient is φ = 130644960.

The previous prime is 163306207. The next prime is 163306237. The reversal of 163306225 is 522603361.

It can be written as a sum of positive squares in 3 ways, for example, as 6355441 + 156950784 = 2521^2 + 12528^2 .

It is not a de Polignac number, because 163306225 - 2⁹ = 163305713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163306193 and 163306202.

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, 3266100 + ... + 3266149.

Almost surely, 2^163306225 is an apocalyptic number.

It is an amenable number.

163306225 is a deficient number, since it is larger than the sum of its proper divisors (39193525).

163306225 is an equidigital number, since it uses as much as digits as its factorization.

163306225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6532259 (or 6532254 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 163306225 is about 12779.1324040406. The cubic root of 163306225 is about 546.5974231072.

Adding to 163306225 its reverse (522603361), we get a palindrome (685909586).

The spelling of 163306225 in words is "one hundred sixty-three million, three hundred six thousand, two hundred twenty-five".