813001122 has 12 divisors (see below), whose sum is σ = 1761502470. Its totient is φ = 271000368.

The previous prime is 813001097. The next prime is 813001141. The reversal of 813001122 is 221100318.

It can be written as a sum of positive squares in only one way, i.e., 751362921 + 61638201 = 27411^2 + 7851^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 45166729 = 813001122 / (8 + 1 + 3 + 0 + 0 + 1 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 813001095 and 813001104.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22583347 + ... + 22583382.

Almost surely, 2^813001122 is an apocalyptic number.

813001122 is an abundant number, since it is smaller than the sum of its proper divisors (948501348).

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

813001122 is a wasteful number, since it uses less digits than its factorization.

813001122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45166737 (or 45166734 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 813001122 is about 28513.1745338887. The cubic root of 813001122 is about 933.3195901321.

The spelling of 813001122 in words is "eight hundred thirteen million, one thousand, one hundred twenty-two".