51219 has 16 divisors (see below), whose sum is σ = 87040. Its totient is φ = 29160.

The previous prime is 51217. The next prime is 51229. The reversal of 51219 is 91215.

51219 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 51219 - 2¹ = 51217 is a prime.

It is a super-2 number, since 2×51219² = 5246771922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54 + ... + 324.

It is an arithmetic number, because the mean of its divisors is an integer number (5440).

2⁵¹²¹⁹ is an apocalyptic number.

51219 is a deficient number, since it is larger than the sum of its proper divisors (35821).

51219 is a wasteful number, since it uses less digits than its factorization.

51219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 281 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 51219 is about 226.3161505505. The cubic root of 51219 is about 37.1373033398.

The spelling of 51219 in words is "fifty-one thousand, two hundred nineteen".