813328550 has 12 divisors (see below), whose sum is σ = 1512791196. Its totient is φ = 325331400.

The previous prime is 813328543. The next prime is 813328613. The reversal of 813328550 is 55823318.

It is a self number, because there is not a number n which added to its sum of digits gives 813328550.

It is a congruent number.

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, 8133236 + ... + 8133335.

It is an arithmetic number, because the mean of its divisors is an integer number (126065933).

Almost surely, 2^813328550 is an apocalyptic number.

813328550 is a deficient number, since it is larger than the sum of its proper divisors (699462646).

813328550 is a wasteful number, since it uses less digits than its factorization.

813328550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16266583 (or 16266578 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 813328550 is about 28518.9156525980. The cubic root of 813328550 is about 933.4448683318. Note that the first 3 decimals are identical.

The spelling of 813328550 in words is "eight hundred thirteen million, three hundred twenty-eight thousand, five hundred fifty".