8218237 has 4 divisors (see below), whose sum is σ = 8267616. Its totient is φ = 8168860.

The previous prime is 8218229. The next prime is 8218253. The reversal of 8218237 is 7328128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8218237 - 2³ = 8218229 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 a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8218199 and 8218208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8218207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24439 + ... + 24772.

It is an arithmetic number, because the mean of its divisors is an integer number (2066904).

Almost surely, 2^8218237 is an apocalyptic number.

It is an amenable number.

8218237 is a deficient number, since it is larger than the sum of its proper divisors (49379).

8218237 is a wasteful number, since it uses less digits than its factorization.

8218237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49378.

The product of its digits is 5376, while the sum is 31.

The square root of 8218237 is about 2866.7467624469. The cubic root of 8218237 is about 201.8023505387.

The spelling of 8218237 in words is "eight million, two hundred eighteen thousand, two hundred thirty-seven".