812831215 has 16 divisors (see below), whose sum is σ = 1127269440. Its totient is φ = 551105280.

The previous prime is 812831213. The next prime is 812831269. The reversal of 812831215 is 512138218.

It is not a de Polignac number, because 812831215 - 2¹ = 812831213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812831213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127356 + ... + 133585.

It is an arithmetic number, because the mean of its divisors is an integer number (70454340).

Almost surely, 2^812831215 is an apocalyptic number.

812831215 is a deficient number, since it is larger than the sum of its proper divisors (314438225).

812831215 is a wasteful number, since it uses less digits than its factorization.

812831215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261042.

The product of its digits is 3840, while the sum is 31.

The square root of 812831215 is about 28510.1949309365. The cubic root of 812831215 is about 933.2545682539.

The spelling of 812831215 in words is "eight hundred twelve million, eight hundred thirty-one thousand, two hundred fifteen".