22059181 has 4 divisors (see below), whose sum is σ = 22085212. Its totient is φ = 22033152.

The previous prime is 22059151. The next prime is 22059187. The reversal of 22059181 is 18195022.

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 15602500 + 6456681 = 3950^2 + 2541^2 .

It is a cyclic number.

It is not a de Polignac number, because 22059181 - 2¹⁵ = 22026413 is a prime.

It is a super-2 number, since 2×22059181² = 973214932781522, 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 (22059187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11700 + ... + 13453.

It is an arithmetic number, because the mean of its divisors is an integer number (5521303).

Almost surely, 2^22059181 is an apocalyptic number.

It is an amenable number.

22059181 is a deficient number, since it is larger than the sum of its proper divisors (26031).

22059181 is an equidigital number, since it uses as much as digits as its factorization.

22059181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26030.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 22059181 is about 4696.7202386346. The cubic root of 22059181 is about 280.4549618791.

The spelling of 22059181 in words is "twenty-two million, fifty-nine thousand, one hundred eighty-one".