55221333 has 16 divisors (see below), whose sum is σ = 75088320. Its totient is φ = 36089856.

The previous prime is 55221329. The next prime is 55221343. The reversal of 55221333 is 33312255.

It is a happy number.

55221333 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55221333 - 2² = 55221329 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55221343) 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 15 ways as a sum of consecutive naturals, for example, 51123 + ... + 52191.

It is an arithmetic number, because the mean of its divisors is an integer number (4693020).

Almost surely, 2^55221333 is an apocalyptic number.

It is an amenable number.

55221333 is a deficient number, since it is larger than the sum of its proper divisors (19866987).

55221333 is a wasteful number, since it uses less digits than its factorization.

55221333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396.

The product of its digits is 2700, while the sum is 24.

The square root of 55221333 is about 7431.1057723599. The cubic root of 55221333 is about 380.8046959565.

Adding to 55221333 its reverse (33312255), we get a palindrome (88533588).

The spelling of 55221333 in words is "fifty-five million, two hundred twenty-one thousand, three hundred thirty-three".