812151215 has 16 divisors (see below), whose sum is σ = 981696672. Its totient is φ = 644993664.

The previous prime is 812151187. The next prime is 812151233. The reversal of 812151215 is 512151218.

812151215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812151215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 814097 + ... + 815093.

It is an arithmetic number, because the mean of its divisors is an integer number (61356042).

Almost surely, 2^812151215 is an apocalyptic number.

812151215 is a deficient number, since it is larger than the sum of its proper divisors (169545457).

812151215 is a wasteful number, since it uses less digits than its factorization.

812151215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026.

The product of its digits is 800, while the sum is 26.

The square root of 812151215 is about 28498.2668771278. The cubic root of 812151215 is about 932.9942476422.

The spelling of 812151215 in words is "eight hundred twelve million, one hundred fifty-one thousand, two hundred fifteen".