163021823 has 12 divisors (see below), whose sum is σ = 174384288. Its totient is φ = 151872000.

The previous prime is 163021783. The next prime is 163021853. The reversal of 163021823 is 328120361.

It is a Cunningham number, because it is equal to 12768²-1.

It is not a de Polignac number, because 163021823 - 2⁶ = 163021759 is a prime.

It is a super-2 number, since 2×163021823² = 53152229548486658, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163021792 and 163021801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163021853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216698 + ... + 217448.

It is an arithmetic number, because the mean of its divisors is an integer number (14532024).

Almost surely, 2^163021823 is an apocalyptic number.

163021823 is a deficient number, since it is larger than the sum of its proper divisors (11362465).

163021823 is an equidigital number, since it uses as much as digits as its factorization.

163021823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 163021823 is about 12767.9999608396. Note that the first 4 decimals coincide. The cubic root of 163021823 is about 546.2799342305.

The spelling of 163021823 in words is "one hundred sixty-three million, twenty-one thousand, eight hundred twenty-three".