813104220 has 48 divisors (see below), whose sum is σ = 2410617888. Its totient is φ = 204072960.

The previous prime is 813104207. The next prime is 813104263. The reversal of 813104220 is 22401318.

It is a super-2 number, since 2×813104220² = 1322276945163616800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 397561 + ... + 399600.

It is an arithmetic number, because the mean of its divisors is an integer number (50221206).

Almost surely, 2^813104220 is an apocalyptic number.

It is an amenable number.

813104220 is an abundant number, since it is smaller than the sum of its proper divisors (1597513668).

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

813104220 is a wasteful number, since it uses less digits than its factorization.

813104220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797190 (or 797188 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 813104220 is about 28514.9823776905. The cubic root of 813104220 is about 933.3590403917.

Adding to 813104220 its reverse (22401318), we get a palindrome (835505538).

The spelling of 813104220 in words is "eight hundred thirteen million, one hundred four thousand, two hundred twenty".