22569121 has 4 divisors (see below), whose sum is σ = 22579200. Its totient is φ = 22559044.

The previous prime is 22569119. The next prime is 22569137. The reversal of 22569121 is 12196522.

22569121 is a nontrivial binomial coefficient, being equal to C(6719, 2).

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, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 22569121 - 2¹ = 22569119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22569121.

It is not an unprimeable number, because it can be changed into a prime (22567121) 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, 1 + ... + 6718.

It is an arithmetic number, because the mean of its divisors is an integer number (5644800).

Almost surely, 2^22569121 is an apocalyptic number.

22569121 is the 6718-th triangular number.

22569121 is the 2240-th centered nonagonal number.

It is an amenable number.

22569121 is a deficient number, since it is larger than the sum of its proper divisors (10079).

22569121 is an equidigital number, since it uses as much as digits as its factorization.

22569121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10078.

The product of its digits is 2160, while the sum is 28.

The square root of 22569121 is about 4750.6968962459. The cubic root of 22569121 is about 282.5996035861.

The spelling of 22569121 in words is "twenty-two million, five hundred sixty-nine thousand, one hundred twenty-one".