8212279 has 4 divisors (see below), whose sum is σ = 8246880. Its totient is φ = 8177680.

The previous prime is 8212277. The next prime is 8212283. The reversal of 8212279 is 9722128.

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 8212279 - 2¹ = 8212277 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8212279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8212277) 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, 16942 + ... + 17419.

It is an arithmetic number, because the mean of its divisors is an integer number (2061720).

Almost surely, 2^8212279 is an apocalyptic number.

8212279 is a deficient number, since it is larger than the sum of its proper divisors (34601).

8212279 is a wasteful number, since it uses less digits than its factorization.

8212279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34600.

The product of its digits is 4032, while the sum is 31.

The square root of 8212279 is about 2865.7074170264. The cubic root of 8212279 is about 201.7535716633.

The spelling of 8212279 in words is "eight million, two hundred twelve thousand, two hundred seventy-nine".