823221982 has 8 divisors (see below), whose sum is σ = 1347090552. Its totient is φ = 374191800.

The previous prime is 823221961. The next prime is 823222009. The reversal of 823221982 is 289122328.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18709569 + ... + 18709612.

It is an arithmetic number, because the mean of its divisors is an integer number (168386319).

Almost surely, 2^823221982 is an apocalyptic number.

823221982 is a deficient number, since it is larger than the sum of its proper divisors (523868570).

823221982 is a wasteful number, since it uses less digits than its factorization.

823221982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37419194.

The product of its digits is 27648, while the sum is 37.

The square root of 823221982 is about 28691.8452177618. The cubic root of 823221982 is about 937.2144721469.

The spelling of 823221982 in words is "eight hundred twenty-three million, two hundred twenty-one thousand, nine hundred eighty-two".