812055015 has 12 divisors (see below), whose sum is σ = 1407562104. Its totient is φ = 433095984.

The previous prime is 812055011. The next prime is 812055017. The reversal of 812055015 is 510550218.

812055015 is a `hidden beast` number, since 81 + 20 + 550 + 15 = 666.

It is not a de Polignac number, because 812055015 - 2² = 812055011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812055015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812055011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9022789 + ... + 9022878.

It is an arithmetic number, because the mean of its divisors is an integer number (117296842).

Almost surely, 2^812055015 is an apocalyptic number.

812055015 is a deficient number, since it is larger than the sum of its proper divisors (595507089).

812055015 is a wasteful number, since it uses less digits than its factorization.

812055015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18045678 (or 18045675 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 812055015 is about 28496.5790052069. The cubic root of 812055015 is about 932.9574082010.

The spelling of 812055015 in words is "eight hundred twelve million, fifty-five thousand, fifteen".