22306525 has 6 divisors (see below), whose sum is σ = 27660122. Its totient is φ = 17845200.

The previous prime is 22306517. The next prime is 22306547. The reversal of 22306525 is 52560322.

It can be written as a sum of positive squares in 3 ways, for example, as 2137444 + 20169081 = 1462^2 + 4491^2 .

It is not a de Polignac number, because 22306525 - 2³ = 22306517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 892261 = 22306525 / (2 + 2 + 3 + 0 + 6 + 5 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22306525.

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, 446106 + ... + 446155.

Almost surely, 2^22306525 is an apocalyptic number.

22306525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22306525 is a deficient number, since it is larger than the sum of its proper divisors (5353597).

22306525 is an equidigital number, since it uses as much as digits as its factorization.

22306525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892271 (or 892266 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 22306525 is about 4722.9784035077. The cubic root of 22306525 is about 281.4992917271.

Adding to 22306525 its reverse (52560322), we get a palindrome (74866847).

The spelling of 22306525 in words is "twenty-two million, three hundred six thousand, five hundred twenty-five".