22321025 has 6 divisors (see below), whose sum is σ = 27678102. Its totient is φ = 17856800.

The previous prime is 22321021. The next prime is 22321043. The reversal of 22321025 is 52012322.

It can be written as a sum of positive squares in 3 ways, for example, as 2598544 + 19722481 = 1612^2 + 4441^2 .

It is not a de Polignac number, because 22321025 - 2² = 22321021 is a prime.

It is a super-3 number, since 3×22321025³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22320994 and 22321012.

It is not an unprimeable number, because it can be changed into a prime (22321021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 446396 + ... + 446445.

It is an arithmetic number, because the mean of its divisors is an integer number (4613017).

Almost surely, 2^22321025 is an apocalyptic number.

22321025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22321025 is a deficient number, since it is larger than the sum of its proper divisors (5357077).

22321025 is an equidigital number, since it uses as much as digits as its factorization.

22321025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892851 (or 892846 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22321025 is about 4724.5132024368. The cubic root of 22321025 is about 281.5602732205.

Adding to 22321025 its reverse (52012322), we get a palindrome (74333347).

The spelling of 22321025 in words is "twenty-two million, three hundred twenty-one thousand, twenty-five".