813041550 has 144 divisors (see below), whose sum is σ = 2304508752. Its totient is φ = 213062400.

The previous prime is 813041539. The next prime is 813041563. The reversal of 813041550 is 55140318.

813041550 is a `hidden beast` number, since 81 + 30 + 4 + 1 + 550 = 666.

It is a super-2 number, since 2×813041550² = 1322073124052805000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 740602 + ... + 741698.

It is an arithmetic number, because the mean of its divisors is an integer number (16003533).

Almost surely, 2^813041550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813041550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152254376).

813041550 is an abundant number, since it is smaller than the sum of its proper divisors (1491467202).

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

813041550 is a wasteful number, since it uses less digits than its factorization.

813041550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 813041550 is about 28513.8834605180. The cubic root of 813041550 is about 933.3350602292.

Adding to 813041550 its reverse (55140318), we get a palindrome (868181868).

The spelling of 813041550 in words is "eight hundred thirteen million, forty-one thousand, five hundred fifty".