22980161 has 4 divisors (see below), whose sum is σ = 23005524. Its totient is φ = 22954800.

The previous prime is 22980137. The next prime is 22980163. The reversal of 22980161 is 16108922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4490161 + 18490000 = 2119^2 + 4300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22980161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22980163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11270 + ... + 13151.

It is an arithmetic number, because the mean of its divisors is an integer number (5751381).

Almost surely, 2^22980161 is an apocalyptic number.

It is an amenable number.

22980161 is a deficient number, since it is larger than the sum of its proper divisors (25363).

22980161 is an equidigital number, since it uses as much as digits as its factorization.

22980161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25362.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 22980161 is about 4793.7627183664. The cubic root of 22980161 is about 284.3049071060.

The spelling of 22980161 in words is "twenty-two million, nine hundred eighty thousand, one hundred sixty-one".