163225566 has 36 divisors (see below), whose sum is σ = 411397272. Its totient is φ = 46635624.

The previous prime is 163225553. The next prime is 163225597. The reversal of 163225566 is 665522361.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 163225566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 91650 + ... + 93413.

It is an arithmetic number, because the mean of its divisors is an integer number (11427702).

Almost surely, 2^163225566 is an apocalyptic number.

163225566 is an abundant number, since it is smaller than the sum of its proper divisors (248171706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163225566 is a wasteful number, since it uses less digits than its factorization.

163225566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185085 (or 185075 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 163225566 is about 12775.9761270910. The cubic root of 163225566 is about 546.5074178383.

The spelling of 163225566 in words is "one hundred sixty-three million, two hundred twenty-five thousand, five hundred sixty-six".