22545261 has 12 divisors (see below), whose sum is σ = 32610240. Its totient is φ = 15009480.

The previous prime is 22545253. The next prime is 22545283. The reversal of 22545261 is 16254522.

It is not a de Polignac number, because 22545261 - 2³ = 22545253 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22545241) 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 11 ways as a sum of consecutive naturals, for example, 8146 + ... + 10556.

It is an arithmetic number, because the mean of its divisors is an integer number (2717520).

Almost surely, 2^22545261 is an apocalyptic number.

It is an amenable number.

22545261 is a deficient number, since it is larger than the sum of its proper divisors (10064979).

22545261 is a wasteful number, since it uses less digits than its factorization.

22545261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456 (or 3453 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 22545261 is about 4748.1850216688. The cubic root of 22545261 is about 282.4999806824.

Adding to 22545261 its reverse (16254522), we get a palindrome (38799783).

The spelling of 22545261 in words is "twenty-two million, five hundred forty-five thousand, two hundred sixty-one".