809221182 has 192 divisors, whose sum is σ = 2233889280. Its totient is φ = 192460800.

The previous prime is 809221169. The next prime is 809221183. The reversal of 809221182 is 281122908.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809221183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2253919 + ... + 2254277.

It is an arithmetic number, because the mean of its divisors is an integer number (11634840).

Almost surely, 2^809221182 is an apocalyptic number.

809221182 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 809221182, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116944640).

809221182 is an abundant number, since it is smaller than the sum of its proper divisors (1424668098).

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

809221182 is a wasteful number, since it uses less digits than its factorization.

809221182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 809221182 is about 28446.8132134339. The cubic root of 809221182 is about 931.8708944253.

The spelling of 809221182 in words is "eight hundred nine million, two hundred twenty-one thousand, one hundred eighty-two".