22144625 has 24 divisors (see below), whose sum is σ = 29405688. Its totient is φ = 16646400.

The previous prime is 22144621. The next prime is 22144631. The reversal of 22144625 is 52644122.

It can be written as a sum of positive squares in 12 ways, for example, as 16982641 + 5161984 = 4121^2 + 2272^2 .

It is not a de Polignac number, because 22144625 - 2² = 22144621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22144594 and 22144603.

It is not an unprimeable number, because it can be changed into a prime (22144621) 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, 35819 + ... + 36431.

It is an arithmetic number, because the mean of its divisors is an integer number (1225237).

Almost surely, 2^22144625 is an apocalyptic number.

22144625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22144625 is a deficient number, since it is larger than the sum of its proper divisors (7261063).

22144625 is an equidigital number, since it uses as much as digits as its factorization.

22144625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 635 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 22144625 is about 4705.8075821266. The cubic root of 22144625 is about 280.8165999729.

Adding to 22144625 its reverse (52644122), we get a palindrome (74788747).

The spelling of 22144625 in words is "twenty-two million, one hundred forty-four thousand, six hundred twenty-five".