22336561 has 6 divisors (see below), whose sum is σ = 24187110. Its totient is φ = 20618208.

The previous prime is 22336543. The next prime is 22336591. The reversal of 22336561 is 16563322.

It can be written as a sum of positive squares in 3 ways, for example, as 2480625 + 19855936 = 1575^2 + 4456^2 .

It is not a de Polignac number, because 22336561 - 2¹¹ = 22334513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22336511) 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 5 ways as a sum of consecutive naturals, for example, 65916 + ... + 66253.

It is an arithmetic number, because the mean of its divisors is an integer number (4031185).

Almost surely, 2^22336561 is an apocalyptic number.

It is an amenable number.

22336561 is a deficient number, since it is larger than the sum of its proper divisors (1850549).

22336561 is a wasteful number, since it uses less digits than its factorization.

22336561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132195 (or 132182 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 22336561 is about 4726.1571069951. The cubic root of 22336561 is about 281.6255824364.

Adding to 22336561 its reverse (16563322), we get a palindrome (38899883).

The spelling of 22336561 in words is "twenty-two million, three hundred thirty-six thousand, five hundred sixty-one".