22064561 has 4 divisors (see below), whose sum is σ = 22283124. Its totient is φ = 21846000.

The previous prime is 22064531. The next prime is 22064569. The reversal of 22064561 is 16546022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8880400 + 13184161 = 2980^2 + 3631^2 .

It is a cyclic number.

It is not a de Polignac number, because 22064561 - 2¹⁴ = 22048177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22064561.

It is not an unprimeable number, because it can be changed into a prime (22064569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109130 + ... + 109331.

It is an arithmetic number, because the mean of its divisors is an integer number (5570781).

Almost surely, 2^22064561 is an apocalyptic number.

It is an amenable number.

22064561 is a deficient number, since it is larger than the sum of its proper divisors (218563).

22064561 is a wasteful number, since it uses less digits than its factorization.

22064561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218562.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22064561 is about 4697.2929438135. The cubic root of 22064561 is about 280.4777600215.

The spelling of 22064561 in words is "twenty-two million, sixty-four thousand, five hundred sixty-one".