821162223959 has 8 divisors (see below), whose sum is σ = 1023786668928. Its totient is φ = 639866667960.

The previous prime is 821162223943. The next prime is 821162224109. The reversal of 821162223959 is 959322261128.

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

It is a cyclic number.

It is not a de Polignac number, because 821162223959 - 2⁴ = 821162223943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821162223059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5332222157 + ... + 5332222310.

It is an arithmetic number, because the mean of its divisors is an integer number (127973333616).

Almost surely, 2^821162223959 is an apocalyptic number.

821162223959 is a deficient number, since it is larger than the sum of its proper divisors (202624444969).

821162223959 is a wasteful number, since it uses less digits than its factorization.

821162223959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10664444485.

The product of its digits is 933120, while the sum is 50.

The spelling of 821162223959 in words is "eight hundred twenty-one billion, one hundred sixty-two million, two hundred twenty-three thousand, nine hundred fifty-nine".