22161198 has 16 divisors (see below), whose sum is σ = 44737920. Its totient is φ = 7317816.

The previous prime is 22161179. The next prime is 22161199. The reversal of 22161198 is 89116122.

It is a happy number.

It is a super-2 number, since 2×22161198² = 982237393590408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22161199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16618 + ... + 17901.

It is an arithmetic number, because the mean of its divisors is an integer number (2796120).

Almost surely, 2^22161198 is an apocalyptic number.

22161198 is an abundant number, since it is smaller than the sum of its proper divisors (22576722).

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

22161198 is a wasteful number, since it uses less digits than its factorization.

22161198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34631.

The product of its digits is 1728, while the sum is 30.

The square root of 22161198 is about 4707.5681620132. The cubic root of 22161198 is about 280.8866367273.

The spelling of 22161198 in words is "twenty-two million, one hundred sixty-one thousand, one hundred ninety-eight".