55544321 has 16 divisors (see below), whose sum is σ = 67723776. Its totient is φ = 44468736.

The previous prime is 55544267. The next prime is 55544323. The reversal of 55544321 is 12344555.

It is not a de Polignac number, because 55544321 - 2⁶ = 55544257 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55544323) 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 15 ways as a sum of consecutive naturals, for example, 14600 + ... + 18006.

It is an arithmetic number, because the mean of its divisors is an integer number (4232736).

Almost surely, 2^55544321 is an apocalyptic number.

It is an amenable number.

55544321 is a deficient number, since it is larger than the sum of its proper divisors (12179455).

55544321 is a wasteful number, since it uses less digits than its factorization.

55544321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568.

The product of its digits is 12000, while the sum is 29.

The square root of 55544321 is about 7452.8062499974. The cubic root of 55544321 is about 381.5456917390.

Adding to 55544321 its reverse (12344555), we get a palindrome (67888876).

The spelling of 55544321 in words is "fifty-five million, five hundred forty-four thousand, three hundred twenty-one".