55311 has 8 divisors (see below), whose sum is σ = 74880. Its totient is φ = 36312.

The previous prime is 55291. The next prime is 55313. The reversal of 55311 is 11355.

55311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55311 - 2⁹ = 54799 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220 + ... + 398.

It is an arithmetic number, because the mean of its divisors is an integer number (9360).

2⁵⁵³¹¹ is an apocalyptic number.

55311 is a deficient number, since it is larger than the sum of its proper divisors (19569).

55311 is a wasteful number, since it uses less digits than its factorization.

55311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285.

The product of its digits is 75, while the sum is 15.

The square root of 55311 is about 235.1829075422. The cubic root of 55311 is about 38.1010698165.

Adding to 55311 its reverse (11355), we get a palindrome (66666).

Subtracting from 55311 its reverse (11355), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 55311 in words is "fifty-five thousand, three hundred eleven".