813225522318 has 32 divisors (see below), whose sum is σ = 1774936056960. Its totient is φ = 246345056160.

The previous prime is 813225522299. The next prime is 813225522331.

813225522318 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×813225522318² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 813225522318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1984348 + ... + 2358831.

It is an arithmetic number, because the mean of its divisors is an integer number (55466751780).

Almost surely, 2^813225522318 is an apocalyptic number.

813225522318 is an abundant number, since it is smaller than the sum of its proper divisors (961710534642).

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

813225522318 is a wasteful number, since it uses less digits than its factorization.

813225522318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4346032.

The product of its digits is 230400, while the sum is 42.

The spelling of 813225522318 in words is "eight hundred thirteen billion, two hundred twenty-five million, five hundred twenty-two thousand, three hundred eighteen".