22608181 has 6 divisors (see below), whose sum is σ = 24016610. Its totient is φ = 21278016.

The previous prime is 22608169. The next prime is 22608203. The reversal of 22608181 is 18180622.

It can be written as a sum of positive squares in 3 ways, for example, as 12013156 + 10595025 = 3466^2 + 3255^2 .

It is not a de Polignac number, because 22608181 - 2²³ = 14219573 is a prime.

It is a super-2 number, since 2×22608181² = 1022259696257522, 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 (22608101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38826 + ... + 39403.

Almost surely, 2^22608181 is an apocalyptic number.

It is an amenable number.

22608181 is a deficient number, since it is larger than the sum of its proper divisors (1408429).

22608181 is an equidigital number, since it uses as much as digits as its factorization.

22608181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78263 (or 78246 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 22608181 is about 4754.8060948897. The cubic root of 22608181 is about 282.7625397600.

The spelling of 22608181 in words is "twenty-two million, six hundred eight thousand, one hundred eighty-one".