812271807 has 30 divisors (see below), whose sum is σ = 1227315584. Its totient is φ = 535338720.

The previous prime is 812271797. The next prime is 812271829. The reversal of 812271807 is 708172218.

It is a happy number.

812271807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 812271807 - 2⁶ = 812271743 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 (812271847) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2890507 + ... + 2890787.

Almost surely, 2^812271807 is an apocalyptic number.

812271807 is a deficient number, since it is larger than the sum of its proper divisors (415043777).

812271807 is an equidigital number, since it uses as much as digits as its factorization.

812271807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 812271807 is about 28500.3825763796. The cubic root of 812271807 is about 933.0404238025.

The spelling of 812271807 in words is "eight hundred twelve million, two hundred seventy-one thousand, eight hundred seven".