8218831 has 2 divisors, whose sum is σ = 8218832. Its totient is φ = 8218830.

The previous prime is 8218817. The next prime is 8218853. The reversal of 8218831 is 1388128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8218831 - 2⁷ = 8218703 is a prime.

It is a super-2 number, since 2×8218831² = 135098366013122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8218793 and 8218802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8218801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4109415 + 4109416.

It is an arithmetic number, because the mean of its divisors is an integer number (4109416).

Almost surely, 2^8218831 is an apocalyptic number.

8218831 is a deficient number, since it is larger than the sum of its proper divisors (1).

8218831 is an equidigital number, since it uses as much as digits as its factorization.

8218831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 31.

The square root of 8218831 is about 2866.8503623315. The cubic root of 8218831 is about 201.8072123969.

The spelling of 8218831 in words is "eight million, two hundred eighteen thousand, eight hundred thirty-one".