161823822 has 8 divisors (see below), whose sum is σ = 323647656. Its totient is φ = 53941272.

The previous prime is 161823763. The next prime is 161823847. The reversal of 161823822 is 228328161.

161823822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

161823822 is an admirable number.

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, 13485313 + ... + 13485324.

It is an arithmetic number, because the mean of its divisors is an integer number (40455957).

Almost surely, 2^161823822 is an apocalyptic number.

161823822 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161823822 is a wasteful number, since it uses less digits than its factorization.

161823822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26970642.

The product of its digits is 9216, while the sum is 33.

The square root of 161823822 is about 12720.9992532033. Note that the first 3 decimals coincide. The cubic root of 161823822 is about 544.9384909401.

The spelling of 161823822 in words is "one hundred sixty-one million, eight hundred twenty-three thousand, eight hundred twenty-two".