55307 has 4 divisors (see below), whose sum is σ = 63216. Its totient is φ = 47400.

The previous prime is 55291. The next prime is 55313. The reversal of 55307 is 70355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70355 = 5 ⋅14071.

It is a cyclic number.

It is not a de Polignac number, because 55307 - 2⁴ = 55291 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55307.

It is not an unprimeable number, because it can be changed into a prime (55337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3944 + ... + 3957.

It is an arithmetic number, because the mean of its divisors is an integer number (15804).

2⁵⁵³⁰⁷ is an apocalyptic number.

55307 is a deficient number, since it is larger than the sum of its proper divisors (7909).

55307 is an equidigital number, since it uses as much as digits as its factorization.

55307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7908.

The product of its (nonzero) digits is 525, while the sum is 20.

The square root of 55307 is about 235.1744033691. The cubic root of 55307 is about 38.1001513256.

The spelling of 55307 in words is "fifty-five thousand, three hundred seven".