55211 has 8 divisors (see below), whose sum is σ = 61824. Its totient is φ = 48960.

The previous prime is 55207. The next prime is 55213. The reversal of 55211 is 11255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55211 - 2² = 55207 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55211.

It is not an unprimeable number, because it can be changed into a prime (55213) 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, 335 + ... + 471.

It is an arithmetic number, because the mean of its divisors is an integer number (7728).

2⁵⁵²¹¹ is an apocalyptic number.

55211 is a deficient number, since it is larger than the sum of its proper divisors (6613).

55211 is a wasteful number, since it uses less digits than its factorization.

55211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181.

The product of its digits is 50, while the sum is 14.

The square root of 55211 is about 234.9702108779. The cubic root of 55211 is about 38.0780942453.

Adding to 55211 its sum of digits (14), we get a square (55225 = 235²).

Adding to 55211 its reverse (11255), we get a palindrome (66466).

Subtracting from 55211 its reverse (11255), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 55211 in words is "fifty-five thousand, two hundred eleven".