5218311 has 16 divisors (see below), whose sum is σ = 7999488. Its totient is φ = 2964000.

The previous prime is 5218307. The next prime is 5218313. The reversal of 5218311 is 1138125.

It is not a de Polignac number, because 5218311 - 2² = 5218307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

5218311 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218313) 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, 3361 + ... + 4661.

It is an arithmetic number, because the mean of its divisors is an integer number (499968).

Almost surely, 2^5218311 is an apocalyptic number.

5218311 is a deficient number, since it is larger than the sum of its proper divisors (2781177).

5218311 is a wasteful number, since it uses less digits than its factorization.

5218311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502.

The product of its digits is 240, while the sum is 21.

The square root of 5218311 is about 2284.3622742464. The cubic root of 5218311 is about 173.4509380222.

The spelling of 5218311 in words is "five million, two hundred eighteen thousand, three hundred eleven".