22730181 has 8 divisors (see below), whose sum is σ = 30508224. Its totient is φ = 15052800.

The previous prime is 22730177. The next prime is 22730209. The reversal of 22730181 is 18103722.

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

It is not a de Polignac number, because 22730181 - 2² = 22730177 is a prime.

It is a super-2 number, since 2×22730181² = 1033322256585522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22730381) 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, 24636 + ... + 25541.

It is an arithmetic number, because the mean of its divisors is an integer number (3813528).

Almost surely, 2^22730181 is an apocalyptic number.

It is an amenable number.

22730181 is a deficient number, since it is larger than the sum of its proper divisors (7778043).

22730181 is a wasteful number, since it uses less digits than its factorization.

22730181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50331.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 22730181 is about 4767.6179586875. The cubic root of 22730181 is about 283.2702492387.

The spelling of 22730181 in words is "twenty-two million, seven hundred thirty thousand, one hundred eighty-one".