813321030 has 64 divisors (see below), whose sum is σ = 2058312960. Its totient is φ = 205110144.

The previous prime is 813321023. The next prime is 813321043. The reversal of 813321030 is 30123318.

It is a happy number.

It is a super-2 number, since 2×813321030² = 1322982195680521800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813320988 and 813321006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 499077 + ... + 500703.

It is an arithmetic number, because the mean of its divisors is an integer number (32161140).

Almost surely, 2^813321030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813321030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029156480).

813321030 is an abundant number, since it is smaller than the sum of its proper divisors (1244991930).

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

813321030 is a wasteful number, since it uses less digits than its factorization.

813321030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 813321030 is about 28518.7838099734. The cubic root of 813321030 is about 933.4419914596.

Adding to 813321030 its reverse (30123318), we get a palindrome (843444348).

The spelling of 813321030 in words is "eight hundred thirteen million, three hundred twenty-one thousand, thirty".