22416561 has 32 divisors (see below), whose sum is σ = 35932800. Its totient is φ = 13763520.

The previous prime is 22416539. The next prime is 22416571. The reversal of 22416561 is 16561422.

22416561 is a `hidden beast` number, since 2 + 2 + 4 + 1 + 656 + 1 = 666.

It is not a de Polignac number, because 22416561 - 2⁵ = 22416529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22416521) 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 31 ways as a sum of consecutive naturals, for example, 18391 + ... + 19571.

It is an arithmetic number, because the mean of its divisors is an integer number (1122900).

Almost surely, 2^22416561 is an apocalyptic number.

It is an amenable number.

22416561 is a deficient number, since it is larger than the sum of its proper divisors (13516239).

22416561 is a wasteful number, since it uses less digits than its factorization.

22416561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 1240 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 22416561 is about 4734.6130781723. The cubic root of 22416561 is about 281.9614025943.

Adding to 22416561 its reverse (16561422), we get a palindrome (38977983).

The spelling of 22416561 in words is "twenty-two million, four hundred sixteen thousand, five hundred sixty-one".