22561025 has 24 divisors (see below), whose sum is σ = 29593344. Its totient is φ = 17035200.

The previous prime is 22561003. The next prime is 22561027. The reversal of 22561025 is 52016522.

It is not a de Polignac number, because 22561025 - 2¹⁰ = 22560001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22561027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32987 + ... + 33663.

It is an arithmetic number, because the mean of its divisors is an integer number (1233056).

Almost surely, 2^22561025 is an apocalyptic number.

22561025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22561025 is a deficient number, since it is larger than the sum of its proper divisors (7032319).

22561025 is a wasteful number, since it uses less digits than its factorization.

22561025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 22561025 is about 4749.8447343045. The cubic root of 22561025 is about 282.5658081476.

Adding to 22561025 its reverse (52016522), we get a palindrome (74577547).

The spelling of 22561025 in words is "twenty-two million, five hundred sixty-one thousand, twenty-five".