22100181 has 8 divisors (see below), whose sum is σ = 29493024. Its totient is φ = 14720400.

The previous prime is 22100167. The next prime is 22100191. The reversal of 22100181 is 18100122.

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

It is not a de Polignac number, because 22100181 - 2⁵ = 22100149 is a prime.

It is a super-2 number, since 2×22100181² = 976836000465522, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22100181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100131) 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, 1815 + ... + 6891.

It is an arithmetic number, because the mean of its divisors is an integer number (3686628).

Almost surely, 2^22100181 is an apocalyptic number.

It is an amenable number.

22100181 is a deficient number, since it is larger than the sum of its proper divisors (7392843).

22100181 is a wasteful number, since it uses less digits than its factorization.

22100181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6531.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 22100181 is about 4701.0829603401. The cubic root of 22100181 is about 280.6286089552.

The spelling of 22100181 in words is "twenty-two million, one hundred thousand, one hundred eighty-one".