84215 has 4 divisors (see below), whose sum is σ = 101064. Its totient is φ = 67368.

The previous prime is 84211. The next prime is 84221. The reversal of 84215 is 51248.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84215 - 2² = 84211 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 (84211) 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, 8417 + ... + 8426.

It is an arithmetic number, because the mean of its divisors is an integer number (25266).

2⁸⁴²¹⁵ is an apocalyptic number.

84215 is a deficient number, since it is larger than the sum of its proper divisors (16849).

84215 is a wasteful number, since it uses less digits than its factorization.

84215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16848.

The product of its digits is 320, while the sum is 20.

The square root of 84215 is about 290.1982081268. The cubic root of 84215 is about 43.8325245104.

The spelling of 84215 in words is "eighty-four thousand, two hundred fifteen".