22120309 has 4 divisors (see below), whose sum is σ = 22235116. Its totient is φ = 22005504.

The previous prime is 22120303. The next prime is 22120331. The reversal of 22120309 is 90302122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90302122 = 2 ⋅45151061.

It can be written as a sum of positive squares in 2 ways, for example, as 6517809 + 15602500 = 2553^2 + 3950^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120309 - 2⁵ = 22120277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120303) 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, 57114 + ... + 57499.

It is an arithmetic number, because the mean of its divisors is an integer number (5558779).

Almost surely, 2^22120309 is an apocalyptic number.

It is an amenable number.

22120309 is a deficient number, since it is larger than the sum of its proper divisors (114807).

22120309 is a wasteful number, since it uses less digits than its factorization.

22120309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114806.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 22120309 is about 4703.2232564487. The cubic root of 22120309 is about 280.7137783738.

The spelling of 22120309 in words is "twenty-two million, one hundred twenty thousand, three hundred nine".