5218357 has 4 divisors (see below), whose sum is σ = 5345676. Its totient is φ = 5091040.

The previous prime is 5218349. The next prime is 5218361. The reversal of 5218357 is 7538125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2099601 + 3118756 = 1449^2 + 1766^2 .

It is a cyclic number.

It is not a de Polignac number, because 5218357 - 2³ = 5218349 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63598 + ... + 63679.

It is an arithmetic number, because the mean of its divisors is an integer number (1336419).

Almost surely, 2^5218357 is an apocalyptic number.

It is an amenable number.

5218357 is a deficient number, since it is larger than the sum of its proper divisors (127319).

5218357 is a wasteful number, since it uses less digits than its factorization.

5218357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127318.

The product of its digits is 8400, while the sum is 31.

The square root of 5218357 is about 2284.3723426797. The cubic root of 5218357 is about 173.4514476839.

The spelling of 5218357 in words is "five million, two hundred eighteen thousand, three hundred fifty-seven".