813212300 has 36 divisors (see below), whose sum is σ = 1770485640. Its totient is φ = 324213120.

The previous prime is 813212273. The next prime is 813212339. The reversal of 813212300 is 3212318.

It is a super-2 number, since 2×813212300² = 1322628489742580000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17456 + ... + 43944.

Almost surely, 2^813212300 is an apocalyptic number.

It is an amenable number.

813212300 is an abundant number, since it is smaller than the sum of its proper divisors (957273340).

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

813212300 is a wasteful number, since it uses less digits than its factorization.

813212300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26810 (or 26803 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 813212300 is about 28516.8774587962. The cubic root of 813212300 is about 933.4003934242.

Adding to 813212300 its reverse (3212318), we get a palindrome (816424618).

The spelling of 813212300 in words is "eight hundred thirteen million, two hundred twelve thousand, three hundred".