55321211 has 4 divisors (see below), whose sum is σ = 60350424. Its totient is φ = 50292000.

The previous prime is 55321207. The next prime is 55321223. The reversal of 55321211 is 11212355.

It is a happy number.

55321211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55321211 - 2² = 55321207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55321271) 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 3 ways as a sum of consecutive naturals, for example, 2514590 + ... + 2514611.

It is an arithmetic number, because the mean of its divisors is an integer number (15087606).

Almost surely, 2^55321211 is an apocalyptic number.

55321211 is a deficient number, since it is larger than the sum of its proper divisors (5029213).

55321211 is a wasteful number, since it uses less digits than its factorization.

55321211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029212.

The product of its digits is 300, while the sum is 20.

The square root of 55321211 is about 7437.8230013896. The cubic root of 55321211 is about 381.0341429344.

Adding to 55321211 its reverse (11212355), we get a palindrome (66533566).

The spelling of 55321211 in words is "fifty-five million, three hundred twenty-one thousand, two hundred eleven".