163323231 has 4 divisors (see below), whose sum is σ = 217764312. Its totient is φ = 108882152.

The previous prime is 163323211. The next prime is 163323239. The reversal of 163323231 is 132323361.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 163323231 - 2⁷ = 163323103 is a prime.

It is a super-2 number, since 2×163323231² = 53348955568558722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163323239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27220536 + ... + 27220541.

It is an arithmetic number, because the mean of its divisors is an integer number (54441078).

Almost surely, 2^163323231 is an apocalyptic number.

163323231 is a deficient number, since it is larger than the sum of its proper divisors (54441081).

163323231 is an equidigital number, since it uses as much as digits as its factorization.

163323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54441080.

The product of its digits is 1944, while the sum is 24.

The square root of 163323231 is about 12779.7977683530. The cubic root of 163323231 is about 546.6163958747.

Adding to 163323231 its reverse (132323361), we get a palindrome (295646592).

The spelling of 163323231 in words is "one hundred sixty-three million, three hundred twenty-three thousand, two hundred thirty-one".