163643233 has 4 divisors (see below), whose sum is σ = 176231188. Its totient is φ = 151055280.

The previous prime is 163643231. The next prime is 163643239. The reversal of 163643233 is 332346361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28804689 + 134838544 = 5367^2 + 11612^2 .

It is a cyclic number.

It is not a de Polignac number, because 163643233 - 2¹ = 163643231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163643195 and 163643204.

It is not an unprimeable number, because it can be changed into a prime (163643231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6293958 + ... + 6293983.

It is an arithmetic number, because the mean of its divisors is an integer number (44057797).

Almost surely, 2^163643233 is an apocalyptic number.

163643233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

163643233 is a deficient number, since it is larger than the sum of its proper divisors (12587955).

163643233 is a wasteful number, since it uses less digits than its factorization.

163643233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12587954.

The product of its digits is 23328, while the sum is 31.

The square root of 163643233 is about 12792.3114799476. The cubic root of 163643233 is about 546.9731612552.

Adding to 163643233 its reverse (332346361), we get a palindrome (495989594).

The spelling of 163643233 in words is "one hundred sixty-three million, six hundred forty-three thousand, two hundred thirty-three".