812316501 has 12 divisors (see below), whose sum is σ = 1184313312. Its totient is φ = 536482536.

The previous prime is 812316497. The next prime is 812316503. The reversal of 812316501 is 105613218.

812316501 is a `hidden beast` number, since 8 + 1 + 2 + 3 + 1 + 650 + 1 = 666.

It is not a de Polignac number, because 812316501 - 2² = 812316497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812316503) 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 11 ways as a sum of consecutive naturals, for example, 420801 + ... + 422726.

It is an arithmetic number, because the mean of its divisors is an integer number (98692776).

Almost surely, 2^812316501 is an apocalyptic number.

It is an amenable number.

812316501 is a deficient number, since it is larger than the sum of its proper divisors (371996811).

812316501 is a wasteful number, since it uses less digits than its factorization.

812316501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843640 (or 843637 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 812316501 is about 28501.1666603316. The cubic root of 812316501 is about 933.0575365241.

Adding to 812316501 its reverse (105613218), we get a palindrome (917929719).

The spelling of 812316501 in words is "eight hundred twelve million, three hundred sixteen thousand, five hundred one".