163322561 has 4 divisors (see below), whose sum is σ = 166090800. Its totient is φ = 160554324.

The previous prime is 163322513. The next prime is 163322569. The reversal of 163322561 is 165223361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163322561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163322569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384031 + ... + 1384148.

It is an arithmetic number, because the mean of its divisors is an integer number (41522700).

Almost surely, 2^163322561 is an apocalyptic number.

It is an amenable number.

163322561 is a deficient number, since it is larger than the sum of its proper divisors (2768239).

163322561 is an equidigital number, since it uses as much as digits as its factorization.

163322561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768238.

The product of its digits is 6480, while the sum is 29.

The square root of 163322561 is about 12779.7715550788. The cubic root of 163322561 is about 546.6156484132.

The spelling of 163322561 in words is "one hundred sixty-three million, three hundred twenty-two thousand, five hundred sixty-one".