22318129 has 4 divisors (see below), whose sum is σ = 22336884. Its totient is φ = 22299376.

The previous prime is 22318117. The next prime is 22318151. The reversal of 22318129 is 92181322.

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 7480225 + 14837904 = 2735^2 + 3852^2 .

It is a cyclic number.

It is not a de Polignac number, because 22318129 - 2⁷ = 22318001 is a prime.

It is a super-3 number, since 3×22318129³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22318097 and 22318106.

It is not an unprimeable number, because it can be changed into a prime (22318189) 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, 7462 + ... + 10015.

It is an arithmetic number, because the mean of its divisors is an integer number (5584221).

Almost surely, 2^22318129 is an apocalyptic number.

It is an amenable number.

22318129 is a deficient number, since it is larger than the sum of its proper divisors (18755).

22318129 is a wasteful number, since it uses less digits than its factorization.

22318129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18754.

The product of its digits is 1728, while the sum is 28.

The square root of 22318129 is about 4724.2067058925. The cubic root of 22318129 is about 281.5480958554.

The spelling of 22318129 in words is "twenty-two million, three hundred eighteen thousand, one hundred twenty-nine".