812313100 has 36 divisors (see below), whose sum is σ = 1766293200. Its totient is φ = 324266560.

The previous prime is 812313071. The next prime is 812313101. The reversal of 812313100 is 1313218.

It is a super-2 number, since 2×812313100² = 1319705144863220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812313101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42921 + ... + 58879.

It is an arithmetic number, because the mean of its divisors is an integer number (49063700).

Almost surely, 2^812313100 is an apocalyptic number.

It is an amenable number.

812313100 is an abundant number, since it is smaller than the sum of its proper divisors (953980100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812313100 is a wasteful number, since it uses less digits than its factorization.

812313100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16482 (or 16475 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 812313100 is about 28501.1069960449. The cubic root of 812313100 is about 933.0562343497.

Adding to 812313100 its reverse (1313218), we get a palindrome (813626318).

The spelling of 812313100 in words is "eight hundred twelve million, three hundred thirteen thousand, one hundred".