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54247 = 173191
BaseRepresentation
bin1101001111100111
32202102011
431033213
53213442
61055051
7314104
oct151747
982364
1054247
1137836
1227487
131b8cb
1415aab
1511117
hexd3e7

54247 has 4 divisors (see below), whose sum is σ = 57456. Its totient is φ = 51040.

The previous prime is 54217. The next prime is 54251. The reversal of 54247 is 74245.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-54247 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

54247 is a lucky number.

It is a plaindrome in base 14 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54217) 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 3 ways as a sum of consecutive naturals, for example, 1579 + ... + 1612.

It is an arithmetic number, because the mean of its divisors is an integer number (14364).

254247 is an apocalyptic number.

54247 is a deficient number, since it is larger than the sum of its proper divisors (3209).

54247 is a wasteful number, since it uses less digits than its factorization.

54247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208.

The product of its digits is 1120, while the sum is 22.

The square root of 54247 is about 232.9098538061. The cubic root of 54247 is about 37.8551735740.

The spelling of 54247 in words is "fifty-four thousand, two hundred forty-seven".

Divisors: 1 17 3191 54247