22135424 has 16 divisors (see below), whose sum is σ = 44098170. Its totient is φ = 11067648.

The previous prime is 22135423. The next prime is 22135427. The reversal of 22135424 is 42453122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19009600 + 3125824 = 4360^2 + 1768^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 22135424.

It is not an unprimeable number, because it can be changed into a prime (22135423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86339 + ... + 86594.

Almost surely, 2^22135424 is an apocalyptic number.

It is an amenable number.

22135424 is a deficient number, since it is larger than the sum of its proper divisors (21962746).

22135424 is an equidigital number, since it uses as much as digits as its factorization.

22135424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172947 (or 172935 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 22135424 is about 4704.8298587728. The cubic root of 22135424 is about 280.7777018735. Note that the first 4 decimals are identical.

Adding to 22135424 its reverse (42453122), we get a palindrome (64588546).

The spelling of 22135424 in words is "twenty-two million, one hundred thirty-five thousand, four hundred twenty-four".