8138213 has 16 divisors (see below), whose sum is σ = 9085440. Its totient is φ = 7257600.

The previous prime is 8138209. The next prime is 8138219. The reversal of 8138213 is 3128318.

It is a cyclic number.

It is not a de Polignac number, because 8138213 - 2² = 8138209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8138219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23981 + ... + 24317.

It is an arithmetic number, because the mean of its divisors is an integer number (567840).

Almost surely, 2^8138213 is an apocalyptic number.

It is an amenable number.

8138213 is a deficient number, since it is larger than the sum of its proper divisors (947227).

8138213 is a wasteful number, since it uses less digits than its factorization.

8138213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

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

The square root of 8138213 is about 2852.7553347597. The cubic root of 8138213 is about 201.1452050113.

The spelling of 8138213 in words is "eight million, one hundred thirty-eight thousand, two hundred thirteen".