22561983 has 10 divisors (see below), whose sum is σ = 33703824. Its totient is φ = 15041268.

The previous prime is 22561969. The next prime is 22561991. The reversal of 22561983 is 38916522.

22561983 is a `hidden beast` number, since 2 + 2 + 561 + 98 + 3 = 666.

It is not a de Polignac number, because 22561983 - 2⁵ = 22561951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22561933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 139191 + ... + 139352.

Almost surely, 2^22561983 is an apocalyptic number.

22561983 is a deficient number, since it is larger than the sum of its proper divisors (11141841).

22561983 is an equidigital number, since it uses as much as digits as its factorization.

22561983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278555 (or 278546 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 22561983 is about 4749.9455786356. The cubic root of 22561983 is about 282.5698075849.

The spelling of 22561983 in words is "twenty-two million, five hundred sixty-one thousand, nine hundred eighty-three".