22501422 has 16 divisors (see below), whose sum is σ = 50003280. Its totient is φ = 7500456.

The previous prime is 22501403. The next prime is 22501441. The reversal of 22501422 is 22410522.

It is an interprime number because it is at equal distance from previous prime (22501403) and next prime (22501441).

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

It is a junction number, because it is equal to n+sod(n) for n = 22501395 and 22501404.

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 7 ways as a sum of consecutive naturals, for example, 208293 + ... + 208400.

It is an arithmetic number, because the mean of its divisors is an integer number (3125205).

Almost surely, 2^22501422 is an apocalyptic number.

22501422 is an abundant number, since it is smaller than the sum of its proper divisors (27501858).

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

22501422 is a wasteful number, since it uses less digits than its factorization.

22501422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416704 (or 416698 counting only the distinct ones).

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

The square root of 22501422 is about 4743.5663798454. The cubic root of 22501422 is about 282.3167558867.

Adding to 22501422 its reverse (22410522), we get a palindrome (44911944).

The spelling of 22501422 in words is "twenty-two million, five hundred one thousand, four hundred twenty-two".