6812215 has 4 divisors (see below), whose sum is σ = 8174664. Its totient is φ = 5449768.

The previous prime is 6812207. The next prime is 6812231. The reversal of 6812215 is 5122186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5122186 = 2 ⋅2561093.

It is a cyclic number.

It is not a de Polignac number, because 6812215 - 2³ = 6812207 is a prime.

It is an Ulam 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 6812215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681217 + ... + 681226.

It is an arithmetic number, because the mean of its divisors is an integer number (2043666).

Almost surely, 2^6812215 is an apocalyptic number.

6812215 is a deficient number, since it is larger than the sum of its proper divisors (1362449).

6812215 is a wasteful number, since it uses less digits than its factorization.

6812215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362448.

The product of its digits is 960, while the sum is 25.

The square root of 6812215 is about 2610.0220305584. The cubic root of 6812215 is about 189.5670195948.

The spelling of 6812215 in words is "six million, eight hundred twelve thousand, two hundred fifteen".