22449181 has 8 divisors (see below), whose sum is σ = 23124024. Its totient is φ = 21780480.

The previous prime is 22449149. The next prime is 22449191. The reversal of 22449181 is 18194422.

It can be written as a sum of positive squares in 4 ways, for example, as 2280100 + 20169081 = 1510^2 + 4491^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22449181 - 2⁵ = 22449149 is a prime.

It is a super-2 number, since 2×22449181² = 1007931455141522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22449101) 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, 6495 + ... + 9331.

It is an arithmetic number, because the mean of its divisors is an integer number (2890503).

Almost surely, 2^22449181 is an apocalyptic number.

It is an amenable number.

22449181 is a deficient number, since it is larger than the sum of its proper divisors (674843).

22449181 is a wasteful number, since it uses less digits than its factorization.

22449181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071.

The product of its digits is 4608, while the sum is 31.

The square root of 22449181 is about 4738.0566691419. The cubic root of 22449181 is about 282.0981039553.

The spelling of 22449181 in words is "twenty-two million, four hundred forty-nine thousand, one hundred eighty-one".