51389 has 8 divisors (see below), whose sum is σ = 57120. Its totient is φ = 45936.

The previous prime is 51383. The next prime is 51407. The reversal of 51389 is 98315.

51389 = 29³ + 30³.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51389 - 2⁸ = 51133 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51383) 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, 734 + ... + 800.

It is an arithmetic number, because the mean of its divisors is an integer number (7140).

2⁵¹³⁸⁹ is an apocalyptic number.

51389 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

51389 is a deficient number, since it is larger than the sum of its proper divisors (5731).

51389 is a wasteful number, since it uses less digits than its factorization.

51389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139.

The product of its digits is 1080, while the sum is 26.

The square root of 51389 is about 226.6914202170. The cubic root of 51389 is about 37.1783452031.

Adding to 51389 its sum of digits (26), we get a palindrome (51415).

The spelling of 51389 in words is "fifty-one thousand, three hundred eighty-nine".