22561956 has 24 divisors (see below), whose sum is σ = 58494240. Its totient is φ = 7520616.

The previous prime is 22561951. The next prime is 22561961. The reversal of 22561956 is 65916522.

22561956 is a `hidden beast` number, since 2 + 2 + 561 + 95 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (22561951) and next prime (22561961).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 22561956.

It is not an unprimeable number, because it can be changed into a prime (22561951) 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, 104346 + ... + 104561.

It is an arithmetic number, because the mean of its divisors is an integer number (2437260).

Almost surely, 2^22561956 is an apocalyptic number.

It is an amenable number.

22561956 is an abundant number, since it is smaller than the sum of its proper divisors (35932284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22561956 is a wasteful number, since it uses less digits than its factorization.

22561956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208920 (or 208912 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 22561956 is about 4749.9427364969. The cubic root of 22561956 is about 282.5696948674.

The spelling of 22561956 in words is "twenty-two million, five hundred sixty-one thousand, nine hundred fifty-six".