8213885 has 4 divisors (see below), whose sum is σ = 9856668. Its totient is φ = 6571104.

The previous prime is 8213879. The next prime is 8213893. The reversal of 8213885 is 5883128.

8213885 is nontrivially palindromic in base 4.

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 4169764 + 4044121 = 2042^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 8213885 - 2⁴ = 8213869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821384 + ... + 821393.

It is an arithmetic number, because the mean of its divisors is an integer number (2464167).

Almost surely, 2^8213885 is an apocalyptic number.

It is an amenable number.

8213885 is a deficient number, since it is larger than the sum of its proper divisors (1642783).

8213885 is a wasteful number, since it uses less digits than its factorization.

8213885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642782.

The product of its digits is 15360, while the sum is 35.

The square root of 8213885 is about 2865.9876133717. The cubic root of 8213885 is about 201.7667225039.

The spelling of 8213885 in words is "eight million, two hundred thirteen thousand, eight hundred eighty-five".