822213772 has 12 divisors (see below), whose sum is σ = 1523513880. Its totient is φ = 386924096.

The previous prime is 822213727. The next prime is 822213779. The reversal of 822213772 is 277312228.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (822213779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6045622 + ... + 6045757.

It is an arithmetic number, because the mean of its divisors is an integer number (126959490).

Almost surely, 2^822213772 is an apocalyptic number.

It is an amenable number.

822213772 is a deficient number, since it is larger than the sum of its proper divisors (701300108).

822213772 is a wasteful number, since it uses less digits than its factorization.

822213772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12091400 (or 12091398 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 822213772 is about 28674.2702086731. The cubic root of 822213772 is about 936.8317098488.

The spelling of 822213772 in words is "eight hundred twenty-two million, two hundred thirteen thousand, seven hundred seventy-two".