22021325 has 6 divisors (see below), whose sum is σ = 27306474. Its totient is φ = 17617040.

The previous prime is 22021319. The next prime is 22021331. The reversal of 22021325 is 52312022.

It is an interprime number because it is at equal distance from previous prime (22021319) and next prime (22021331).

It can be written as a sum of positive squares in 3 ways, for example, as 137641 + 21883684 = 371^2 + 4678^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22021325 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 440402 + ... + 440451.

It is an arithmetic number, because the mean of its divisors is an integer number (4551079).

Almost surely, 2^22021325 is an apocalyptic number.

22021325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22021325 is a deficient number, since it is larger than the sum of its proper divisors (5285149).

22021325 is an equidigital number, since it uses as much as digits as its factorization.

22021325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880863 (or 880858 counting only the distinct ones).

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

The square root of 22021325 is about 4692.6884618521. The cubic root of 22021325 is about 280.2944394177.

Adding to 22021325 its reverse (52312022), we get a palindrome (74333347).

The spelling of 22021325 in words is "twenty-two million, twenty-one thousand, three hundred twenty-five".