22561057 has 16 divisors (see below), whose sum is σ = 24572160. Its totient is φ = 20636928.

The previous prime is 22561051. The next prime is 22561067. The reversal of 22561057 is 75016522.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22561057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22561051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143623 + ... + 143779.

It is an arithmetic number, because the mean of its divisors is an integer number (1535760).

Almost surely, 2^22561057 is an apocalyptic number.

It is an amenable number.

22561057 is a deficient number, since it is larger than the sum of its proper divisors (2011103).

22561057 is a wasteful number, since it uses less digits than its factorization.

22561057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 22561057 is about 4749.8481028344. The cubic root of 22561057 is about 282.5659417423.

Adding to 22561057 its reverse (75016522), we get a palindrome (97577579).

The spelling of 22561057 in words is "twenty-two million, five hundred sixty-one thousand, fifty-seven".