22561203 has 8 divisors (see below), whose sum is σ = 34379008. Its totient is φ = 12892104.

The previous prime is 22561181. The next prime is 22561219. The reversal of 22561203 is 30216522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22561203 - 2²² = 18366899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1074343 = 22561203 / (2 + 2 + 5 + 6 + 1 + 2 + 0 + 3).

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 22561203.

It is not an unprimeable number, because it can be changed into a prime (22561243) 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 7 ways as a sum of consecutive naturals, for example, 537151 + ... + 537192.

It is an arithmetic number, because the mean of its divisors is an integer number (4297376).

Almost surely, 2^22561203 is an apocalyptic number.

22561203 is a deficient number, since it is larger than the sum of its proper divisors (11817805).

22561203 is a wasteful number, since it uses less digits than its factorization.

22561203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074353.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22561203 is about 4749.8634717221. The cubic root of 22561203 is about 282.5665512666.

Adding to 22561203 its reverse (30216522), we get a palindrome (52777725).

The spelling of 22561203 in words is "twenty-two million, five hundred sixty-one thousand, two hundred three".