22421252 has 12 divisors (see below), whose sum is σ = 44842560. Its totient is φ = 9609096.

The previous prime is 22421233. The next prime is 22421281. The reversal of 22421252 is 25212422.

22421252 is an admirable number.

It is a super-3 number, since 3×22421252³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400352 + ... + 400407.

It is an arithmetic number, because the mean of its divisors is an integer number (3736880).

Almost surely, 2^22421252 is an apocalyptic number.

It is an amenable number.

22421252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22421252 is a wasteful number, since it uses less digits than its factorization.

22421252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800770 (or 800768 counting only the distinct ones).

The product of its digits is 640, while the sum is 20.

The square root of 22421252 is about 4735.1084464878. The cubic root of 22421252 is about 281.9810694332.

Adding to 22421252 its reverse (25212422), we get a palindrome (47633674).

The spelling of 22421252 in words is "twenty-two million, four hundred twenty-one thousand, two hundred fifty-two".