22456561 has 8 divisors (see below), whose sum is σ = 23076648. Its totient is φ = 21840000.

The previous prime is 22456559. The next prime is 22456573. The reversal of 22456561 is 16565422.

It can be written as a sum of positive squares in 4 ways, for example, as 7595536 + 14861025 = 2756^2 + 3855^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22456561 - 2¹ = 22456559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22456501) 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 7 ways as a sum of consecutive naturals, for example, 16611 + ... + 17911.

It is an arithmetic number, because the mean of its divisors is an integer number (2884581).

Almost surely, 2^22456561 is an apocalyptic number.

It is an amenable number.

22456561 is a deficient number, since it is larger than the sum of its proper divisors (620087).

22456561 is a wasteful number, since it uses less digits than its factorization.

22456561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763.

The product of its digits is 14400, while the sum is 31.

The square root of 22456561 is about 4738.8354054556. The cubic root of 22456561 is about 282.1290131143.

The spelling of 22456561 in words is "twenty-two million, four hundred fifty-six thousand, five hundred sixty-one".