22326561 has 6 divisors (see below), whose sum is σ = 32249490. Its totient is φ = 14884368.

The previous prime is 22326553. The next prime is 22326581. The reversal of 22326561 is 16562322.

22326561 is a `hidden beast` number, since 2 + 2 + 3 + 2 + 656 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22268961 + 57600 = 4719^2 + 240^2 .

It is not a de Polignac number, because 22326561 - 2³ = 22326553 is a prime.

It is a super-3 number, since 3×22326561³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22326581) 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, 1240356 + ... + 1240373.

It is an arithmetic number, because the mean of its divisors is an integer number (5374915).

Almost surely, 2^22326561 is an apocalyptic number.

It is an amenable number.

22326561 is a deficient number, since it is larger than the sum of its proper divisors (9922929).

22326561 is a wasteful number, since it uses less digits than its factorization.

22326561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480735 (or 2480732 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 22326561 is about 4725.0990465809. The cubic root of 22326561 is about 281.5835485678.

Adding to 22326561 its reverse (16562322), we get a palindrome (38888883).

The spelling of 22326561 in words is "twenty-two million, three hundred twenty-six thousand, five hundred sixty-one".