84212213 has 4 divisors (see below), whose sum is σ = 86928768. Its totient is φ = 81495660.

The previous prime is 84212179. The next prime is 84212221. The reversal of 84212213 is 31221248.

It is a happy number.

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 not a de Polignac number, because 84212213 - 2⁸ = 84211957 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 (84212243) 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, 1358231 + ... + 1358292.

It is an arithmetic number, because the mean of its divisors is an integer number (21732192).

Almost surely, 2^84212213 is an apocalyptic number.

It is an amenable number.

84212213 is a deficient number, since it is larger than the sum of its proper divisors (2716555).

84212213 is a wasteful number, since it uses less digits than its factorization.

84212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716554.

The product of its digits is 768, while the sum is 23.

The square root of 84212213 is about 9176.7212554376. The cubic root of 84212213 is about 438.3204097577.

The spelling of 84212213 in words is "eighty-four million, two hundred twelve thousand, two hundred thirteen".