5218281 has 6 divisors (see below), whose sum is σ = 7537530. Its totient is φ = 3478848.

The previous prime is 5218277. The next prime is 5218307. The reversal of 5218281 is 1828125.

It can be written as a sum of positive squares in only one way, i.e., 5198400 + 19881 = 2280^2 + 141^2 .

It is not a de Polignac number, because 5218281 - 2² = 5218277 is a prime.

It is a super-2 number, since 2×5218281² = 54460913189922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5218211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289896 + ... + 289913.

It is an arithmetic number, because the mean of its divisors is an integer number (1256255).

Almost surely, 2^5218281 is an apocalyptic number.

It is an amenable number.

5218281 is a deficient number, since it is larger than the sum of its proper divisors (2319249).

5218281 is a wasteful number, since it uses less digits than its factorization.

5218281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579815 (or 579812 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 5218281 is about 2284.3557078529. The cubic root of 5218281 is about 173.4506056325.

The spelling of 5218281 in words is "five million, two hundred eighteen thousand, two hundred eighty-one".