22450181 has 4 divisors (see below), whose sum is σ = 24177132. Its totient is φ = 20723232.

The previous prime is 22450177. The next prime is 22450199. The reversal of 22450181 is 18105422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13653025 + 8797156 = 3695^2 + 2966^2 .

It is a cyclic number.

It is not a de Polignac number, because 22450181 - 2² = 22450177 is a prime.

It is a super-2 number, since 2×22450181² = 1008021253865522, 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 (22450121) 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, 863456 + ... + 863481.

It is an arithmetic number, because the mean of its divisors is an integer number (6044283).

Almost surely, 2^22450181 is an apocalyptic number.

It is an amenable number.

22450181 is a deficient number, since it is larger than the sum of its proper divisors (1726951).

22450181 is a wasteful number, since it uses less digits than its factorization.

22450181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726950.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 22450181 is about 4738.1621964639. The cubic root of 22450181 is about 282.1022925850.

It can be divided in two parts, 224 and 50181, that added together give a palindrome (50405).

The spelling of 22450181 in words is "twenty-two million, four hundred fifty thousand, one hundred eighty-one".