13224555 has 48 divisors (see below), whose sum is σ = 24766560. Its totient is φ = 6503424.

The previous prime is 13224539. The next prime is 13224559. The reversal of 13224555 is 55542231.

It is a happy number.

It is not a de Polignac number, because 13224555 - 2⁴ = 13224539 is a prime.

It is a super-4 number, since 4×13224555⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13224559) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 44989 + ... + 45281.

It is an arithmetic number, because the mean of its divisors is an integer number (515970).

Almost surely, 2^13224555 is an apocalyptic number.

13224555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13224555 is a deficient number, since it is larger than the sum of its proper divisors (11542005).

13224555 is a wasteful number, since it uses less digits than its factorization.

13224555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 377 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 13224555 is about 3636.5581254807. The cubic root of 13224555 is about 236.4796037757.

Adding to 13224555 its reverse (55542231), we get a palindrome (68766786).

The spelling of 13224555 in words is "thirteen million, two hundred twenty-four thousand, five hundred fifty-five".