822172042 has 8 divisors (see below), whose sum is σ = 1266589476. Its totient is φ = 399975552.

The previous prime is 822172033. The next prime is 822172061. The reversal of 822172042 is 240271228.

It can be written as a sum of positive squares in 2 ways, for example, as 783496081 + 38675961 = 27991^2 + 6219^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 822172042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555143 + ... + 5555290.

Almost surely, 2^822172042 is an apocalyptic number.

822172042 is a deficient number, since it is larger than the sum of its proper divisors (444417434).

822172042 is a wasteful number, since it uses less digits than its factorization.

822172042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110472.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 822172042 is about 28673.5425436063. The cubic root of 822172042 is about 936.8158605041.

The spelling of 822172042 in words is "eight hundred twenty-two million, one hundred seventy-two thousand, forty-two".