22221552 has 40 divisors (see below), whose sum is σ = 57652560. Its totient is φ = 7375360.

The previous prime is 22221539. The next prime is 22221557. The reversal of 22221552 is 25512222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221557) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12052 + ... + 13772.

It is an arithmetic number, because the mean of its divisors is an integer number (1441314).

Almost surely, 2^22221552 is an apocalyptic number.

It is an amenable number.

22221552 is an abundant number, since it is smaller than the sum of its proper divisors (35431008).

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

22221552 is a wasteful number, since it uses less digits than its factorization.

22221552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001 (or 1995 counting only the distinct ones).

The product of its digits is 800, while the sum is 21.

The square root of 22221552 is about 4713.9741195726. The cubic root of 22221552 is about 281.1413953023.

Adding to 22221552 its reverse (25512222), we get a palindrome (47733774).

The spelling of 22221552 in words is "twenty-two million, two hundred twenty-one thousand, five hundred fifty-two".