22125630 has 64 divisors (see below), whose sum is σ = 56383488. Its totient is φ = 5546880.

The previous prime is 22125629. The next prime is 22125647. The reversal of 22125630 is 3652122.

It is a junction number, because it is equal to n+sod(n) for n = 22125597 and 22125606.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 34089 + ... + 34731.

It is an arithmetic number, because the mean of its divisors is an integer number (880992).

Almost surely, 2^22125630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22125630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28191744).

22125630 is an abundant number, since it is smaller than the sum of its proper divisors (34257858).

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

22125630 is a wasteful number, since it uses less digits than its factorization.

22125630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22125630 is about 4703.7888983244. The cubic root of 22125630 is about 280.7362849651.

Adding to 22125630 its reverse (3652122), we get a palindrome (25777752).

The spelling of 22125630 in words is "twenty-two million, one hundred twenty-five thousand, six hundred thirty".