22036561 has 8 divisors (see below), whose sum is σ = 23690880. Its totient is φ = 20431728.

The previous prime is 22036529. The next prime is 22036579. The reversal of 22036561 is 16563022.

22036561 is nontrivially palindromic in base 16.

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 22036561 - 2⁵ = 22036529 is a prime.

It is a super-2 number, since 2×22036561² = 971220041413442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22036661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11446 + ... + 13231.

It is an arithmetic number, because the mean of its divisors is an integer number (2961360).

Almost surely, 2^22036561 is an apocalyptic number.

It is an amenable number.

22036561 is a deficient number, since it is larger than the sum of its proper divisors (1654319).

22036561 is a wasteful number, since it uses less digits than its factorization.

22036561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24743.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 22036561 is about 4694.3115576195. The cubic root of 22036561 is about 280.3590674023.

Adding to 22036561 its reverse (16563022), we get a palindrome (38599583).

The spelling of 22036561 in words is "twenty-two million, thirty-six thousand, five hundred sixty-one".