51020 has 12 divisors (see below), whose sum is σ = 107184. Its totient is φ = 20400.

The previous prime is 51001. The next prime is 51031. The reversal of 51020 is 2015.

51020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 50989 and 51007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256 + ... + 1295.

It is an arithmetic number, because the mean of its divisors is an integer number (8932).

2⁵¹⁰²⁰ is an apocalyptic number.

It is an amenable number.

51020 is an abundant number, since it is smaller than the sum of its proper divisors (56164).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53592).

51020 is a wasteful number, since it uses less digits than its factorization.

51020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560 (or 2558 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 51020 is about 225.8760722166. The cubic root of 51020 is about 37.0891446797.

Adding to 51020 its reverse (2015), we get a palindrome (53035).

The spelling of 51020 in words is "fifty-one thousand, twenty".