8257213 has 4 divisors (see below), whose sum is σ = 8266720. Its totient is φ = 8247708.

The previous prime is 8257177. The next prime is 8257217. The reversal of 8257213 is 3127528.

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 a de Polignac number, because none of the positive numbers 2^k-8257213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8257217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3303 + ... + 5236.

It is an arithmetic number, because the mean of its divisors is an integer number (2066680).

Almost surely, 2^8257213 is an apocalyptic number.

It is an amenable number.

8257213 is a deficient number, since it is larger than the sum of its proper divisors (9507).

8257213 is an equidigital number, since it uses as much as digits as its factorization.

8257213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9506.

The product of its digits is 3360, while the sum is 28.

The square root of 8257213 is about 2873.5366710728. The cubic root of 8257213 is about 202.1208716841.

The spelling of 8257213 in words is "eight million, two hundred fifty-seven thousand, two hundred thirteen".