22561187 has 8 divisors (see below), whose sum is σ = 25030080. Its totient is φ = 20161960.

The previous prime is 22561181. The next prime is 22561219. The reversal of 22561187 is 78116522.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22561187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22561181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16733 + ... + 18030.

It is an arithmetic number, because the mean of its divisors is an integer number (3128760).

Almost surely, 2^22561187 is an apocalyptic number.

22561187 is a deficient number, since it is larger than the sum of its proper divisors (2468893).

22561187 is a wasteful number, since it uses less digits than its factorization.

22561187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34833.

The product of its digits is 6720, while the sum is 32.

The square root of 22561187 is about 4749.8617874629. The cubic root of 22561187 is about 282.5664844696.

It can be divided in two parts, 2256 and 1187, that added together give a palindrome (3443).

The spelling of 22561187 in words is "twenty-two million, five hundred sixty-one thousand, one hundred eighty-seven".