201643323 has 32 divisors (see below), whose sum is σ = 326716416. Its totient is φ = 108121728.

The previous prime is 201643261. The next prime is 201643327. The reversal of 201643323 is 323346102.

It is not a de Polignac number, because 201643323 - 2²² = 197449019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201643293 and 201643302.

It is not an unprimeable number, because it can be changed into a prime (201643327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21661 + ... + 29537.

It is an arithmetic number, because the mean of its divisors is an integer number (10209888).

Almost surely, 2^201643323 is an apocalyptic number.

201643323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

201643323 is a deficient number, since it is larger than the sum of its proper divisors (125073093).

201643323 is a wasteful number, since it uses less digits than its factorization.

201643323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7963.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 201643323 is about 14200.1170065602. The cubic root of 201643323 is about 586.4008825699.

Adding to 201643323 its reverse (323346102), we get a palindrome (524989425).

The spelling of 201643323 in words is "two hundred one million, six hundred forty-three thousand, three hundred twenty-three".