22142250 has 96 divisors (see below), whose sum is σ = 64563408. Its totient is φ = 5443200.

The previous prime is 22142231. The next prime is 22142257. The reversal of 22142250 is 5224122.

It can be written as a sum of positive squares in 8 ways, for example, as 42849 + 22099401 = 207^2 + 4701^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22142257) 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 47 ways as a sum of consecutive naturals, for example, 28872 + ... + 29628.

Almost surely, 2^22142250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22142250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32281704).

22142250 is an abundant number, since it is smaller than the sum of its proper divisors (42421158).

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

22142250 is a wasteful number, since it uses less digits than its factorization.

22142250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22142250 is about 4705.5552276007. Note that the first 3 decimals coincide. The cubic root of 22142250 is about 280.8065604672.

Adding to 22142250 its reverse (5224122), we get a palindrome (27366372).

The spelling of 22142250 in words is "twenty-two million, one hundred forty-two thousand, two hundred fifty".