55247 has 4 divisors (see below), whose sum is σ = 55896. Its totient is φ = 54600.

The previous prime is 55243. The next prime is 55249. The reversal of 55247 is 74255.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74255 = 5 ⋅14851.

It is a cyclic number.

It is not a de Polignac number, because 55247 - 2² = 55243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55247.

It is not an unprimeable number, because it can be changed into a prime (55243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173 + ... + 374.

It is an arithmetic number, because the mean of its divisors is an integer number (13974).

2⁵⁵²⁴⁷ is an apocalyptic number.

55247 is a deficient number, since it is larger than the sum of its proper divisors (649).

55247 is a wasteful number, since it uses less digits than its factorization.

55247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its digits is 1400, while the sum is 23.

The square root of 55247 is about 235.0468038498. The cubic root of 55247 is about 38.0863686445.

The spelling of 55247 in words is "fifty-five thousand, two hundred forty-seven".