51547 has 4 divisors (see below), whose sum is σ = 54280. Its totient is φ = 48816.

The previous prime is 51539. The next prime is 51551. The reversal of 51547 is 74515.

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

It is a cyclic number.

It is not a de Polignac number, because 51547 - 2³ = 51539 is a prime.

It is a Duffinian number.

51547 is a lucky number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (51517) 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, 1338 + ... + 1375.

It is an arithmetic number, because the mean of its divisors is an integer number (13570).

2⁵¹⁵⁴⁷ is an apocalyptic number.

51547 is a deficient number, since it is larger than the sum of its proper divisors (2733).

51547 is a wasteful number, since it uses less digits than its factorization.

51547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732.

The product of its digits is 700, while the sum is 22.

The square root of 51547 is about 227.0396441153. The cubic root of 51547 is about 37.2164089170.

The spelling of 51547 in words is "fifty-one thousand, five hundred forty-seven".