22240181 has 4 divisors (see below), whose sum is σ = 22572192. Its totient is φ = 21908172.

The previous prime is 22240147. The next prime is 22240201. The reversal of 22240181 is 18104222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22240181 - 2⁶ = 22240117 is a prime.

It is a super-2 number, since 2×22240181² = 989251301825522, 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 (22240381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165905 + ... + 166038.

It is an arithmetic number, because the mean of its divisors is an integer number (5643048).

Almost surely, 2^22240181 is an apocalyptic number.

It is an amenable number.

22240181 is a deficient number, since it is larger than the sum of its proper divisors (332011).

22240181 is an equidigital number, since it uses as much as digits as its factorization.

22240181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332010.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 22240181 is about 4715.9496392561. The cubic root of 22240181 is about 281.2199364738.

The spelling of 22240181 in words is "twenty-two million, two hundred forty thousand, one hundred eighty-one".