22205544 has 32 divisors (see below), whose sum is σ = 56807520. Its totient is φ = 7229376.

The previous prime is 22205543. The next prime is 22205549. The reversal of 22205544 is 44550222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (22205543) 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, 9727 + ... + 11790.

It is an arithmetic number, because the mean of its divisors is an integer number (1775235).

Almost surely, 2^22205544 is an apocalyptic number.

22205544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22205544 is an abundant number, since it is smaller than the sum of its proper divisors (34601976).

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

22205544 is a wasteful number, since it uses less digits than its factorization.

22205544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21569 (or 21565 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 22205544 is about 4712.2758832649. The cubic root of 22205544 is about 281.0738693769.

Adding to 22205544 its reverse (44550222), we get a palindrome (66755766).

The spelling of 22205544 in words is "twenty-two million, two hundred five thousand, five hundred forty-four".