51340 has 24 divisors (see below), whose sum is σ = 114912. Its totient is φ = 19200.

The previous prime is 51329. The next prime is 51341. The reversal of 51340 is 4315.

51340 is nontrivially palindromic in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 51340.

It is not an unprimeable number, because it can be changed into a prime (51341) 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, 265 + ... + 415.

It is an arithmetic number, because the mean of its divisors is an integer number (4788).

2⁵¹³⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57456).

51340 is an abundant number, since it is smaller than the sum of its proper divisors (63572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51340 is a wasteful number, since it uses less digits than its factorization.

51340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 51340 is about 226.5833180091. The cubic root of 51340 is about 37.1665247860.

Adding to 51340 its reverse (4315), we get a palindrome (55655).

The spelling of 51340 in words is "fifty-one thousand, three hundred forty".