22561461 has 12 divisors (see below), whose sum is σ = 35095788. Its totient is φ = 13883904.

The previous prime is 22561447. The next prime is 22561471. The reversal of 22561461 is 16416522.

22561461 = 919² + 920² + ... + 944².

It can be written as a sum of positive squares in 2 ways, for example, as 938961 + 21622500 = 969^2 + 4650^2 .

It is not a de Polignac number, because 22561461 - 2¹⁰ = 22560437 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22561421) 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, 96300 + ... + 96533.

It is an arithmetic number, because the mean of its divisors is an integer number (2924649).

Almost surely, 2^22561461 is an apocalyptic number.

It is an amenable number.

22561461 is a deficient number, since it is larger than the sum of its proper divisors (12534327).

22561461 is a wasteful number, since it uses less digits than its factorization.

22561461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192852 (or 192849 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 22561461 is about 4749.8906303198. The cubic root of 22561461 is about 282.5676283648.

Adding to 22561461 its reverse (16416522), we get a palindrome (38977983).

The spelling of 22561461 in words is "twenty-two million, five hundred sixty-one thousand, four hundred sixty-one".