22661025 has 24 divisors (see below), whose sum is σ = 37988640. Its totient is φ = 11917440.

The previous prime is 22660997. The next prime is 22661027. The reversal of 22661025 is 52016622.

It is not a de Polignac number, because 22661025 - 2⁵ = 22660993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22660986 and 22661004.

It is not an unprimeable number, because it can be changed into a prime (22661027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3406 + ... + 7544.

It is an arithmetic number, because the mean of its divisors is an integer number (1582860).

Almost surely, 2^22661025 is an apocalyptic number.

22661025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22661025 is a deficient number, since it is larger than the sum of its proper divisors (15327615).

22661025 is a wasteful number, since it uses less digits than its factorization.

22661025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225 (or 4220 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 22661025 is about 4760.3597553126. The cubic root of 22661025 is about 282.9826765441.

Adding to 22661025 its reverse (52016622), we get a palindrome (74677647).

The spelling of 22661025 in words is "twenty-two million, six hundred sixty-one thousand, twenty-five".