22125661 has 8 divisors (see below), whose sum is σ = 22961664. Its totient is φ = 21297360.

The previous prime is 22125647. The next prime is 22125683. The reversal of 22125661 is 16652122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22125661 - 2⁵ = 22125629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22125601) 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 7 ways as a sum of consecutive naturals, for example, 4296 + ... + 7918.

It is an arithmetic number, because the mean of its divisors is an integer number (2870208).

Almost surely, 2^22125661 is an apocalyptic number.

It is an amenable number.

22125661 is a deficient number, since it is larger than the sum of its proper divisors (836003).

22125661 is a wasteful number, since it uses less digits than its factorization.

22125661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3851.

The product of its digits is 1440, while the sum is 25.

The square root of 22125661 is about 4703.7921935392. The cubic root of 22125661 is about 280.7364160773.

Adding to 22125661 its reverse (16652122), we get a palindrome (38777783).

The spelling of 22125661 in words is "twenty-two million, one hundred twenty-five thousand, six hundred sixty-one".