22052250 has 168 divisors, whose sum is σ = 68032692. Its totient is φ = 5346000.

The previous prime is 22052237. The next prime is 22052299. The reversal of 22052250 is 5225022.

It can be written as a sum of positive squares in 2 ways, for example, as 14907321 + 7144929 = 3861^2 + 2673^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 83 ways as a sum of consecutive naturals, for example, 2004745 + ... + 2004755.

Almost surely, 2^22052250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22052250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34016346).

22052250 is an abundant number, since it is smaller than the sum of its proper divisors (45980442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22052250 is an equidigital number, since it uses as much as digits as its factorization.

22052250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 22052250 is about 4695.9823253500. The cubic root of 22052250 is about 280.4255857966.

Adding to 22052250 its reverse (5225022), we get a palindrome (27277272).

The spelling of 22052250 in words is "twenty-two million, fifty-two thousand, two hundred fifty".