51023 has 8 divisors (see below), whose sum is σ = 60192. Its totient is φ = 42336.

The previous prime is 51001. The next prime is 51031. The reversal of 51023 is 32015.

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

It is not a de Polignac number, because 51023 - 2⁸ = 50767 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50995 and 51013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51043) 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, 161 + ... + 357.

It is an arithmetic number, because the mean of its divisors is an integer number (7524).

2⁵¹⁰²³ is an apocalyptic number.

51023 is a deficient number, since it is larger than the sum of its proper divisors (9169).

51023 is a wasteful number, since it uses less digits than its factorization.

51023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 51023 is about 225.8827129286. The cubic root of 51023 is about 37.0898716185.

Adding to 51023 its reverse (32015), we get a palindrome (83038).

It can be divided in two parts, 5 and 1023, that multiplied together give a palindrome (5115).

The spelling of 51023 in words is "fifty-one thousand, twenty-three".