22552181 has 4 divisors (see below), whose sum is σ = 22687392. Its totient is φ = 22416972.

The previous prime is 22552177. The next prime is 22552199. The reversal of 22552181 is 18125522.

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 22552181 - 2² = 22552177 is a prime.

It is a super-2 number, since 2×22552181² = 1017201735713522, which contains 22 as substring.

It is a Duffinian number.

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 22552181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22552171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67355 + ... + 67688.

It is an arithmetic number, because the mean of its divisors is an integer number (5671848).

Almost surely, 2^22552181 is an apocalyptic number.

It is an amenable number.

22552181 is a deficient number, since it is larger than the sum of its proper divisors (135211).

22552181 is a wasteful number, since it uses less digits than its factorization.

22552181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135210.

The product of its digits is 1600, while the sum is 26.

The square root of 22552181 is about 4748.9136652502. The cubic root of 22552181 is about 282.5288810633.

The spelling of 22552181 in words is "twenty-two million, five hundred fifty-two thousand, one hundred eighty-one".