8381213 has 4 divisors (see below), whose sum is σ = 8462688. Its totient is φ = 8299740.

The previous prime is 8381209. The next prime is 8381227. The reversal of 8381213 is 3121838.

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 not a de Polignac number, because 8381213 - 2² = 8381209 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 (8381293) 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, 40583 + ... + 40788.

It is an arithmetic number, because the mean of its divisors is an integer number (2115672).

Almost surely, 2^8381213 is an apocalyptic number.

It is an amenable number.

8381213 is a deficient number, since it is larger than the sum of its proper divisors (81475).

8381213 is a wasteful number, since it uses less digits than its factorization.

8381213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81474.

The product of its digits is 1152, while the sum is 26.

The square root of 8381213 is about 2895.0324695934. The cubic root of 8381213 is about 203.1276103175.

The spelling of 8381213 in words is "eight million, three hundred eighty-one thousand, two hundred thirteen".