22212450 has 72 divisors (see below), whose sum is σ = 64284948. Its totient is φ = 5466240.

The previous prime is 22212439. The next prime is 22212527. The reversal of 22212450 is 5421222.

22212450 is a `hidden beast` number, since 2 + 2 + 212 + 450 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 281961 + 21930489 = 531^2 + 4683^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3952 + ... + 7748.

Almost surely, 2^22212450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22212450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32142474).

22212450 is an abundant number, since it is smaller than the sum of its proper divisors (42072498).

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

22212450 is a wasteful number, since it uses less digits than its factorization.

22212450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828 (or 3820 counting only the distinct ones).

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

The square root of 22212450 is about 4713.0085932449. The cubic root of 22212450 is about 281.1030046677.

Adding to 22212450 its reverse (5421222), we get a palindrome (27633672).

The spelling of 22212450 in words is "twenty-two million, two hundred twelve thousand, four hundred fifty".