163320201323231 has 4 divisors (see below), whose sum is σ = 163709987007000. Its totient is φ = 162930415639464.

The previous prime is 163320201323129. The next prime is 163320201323243. The reversal of 163320201323231 is 132323102023361.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163320201323231 is a prime.

It is a super-2 number, since 2×163320201323231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163320201923231) 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, 194892841256 + ... + 194892842093.

It is an arithmetic number, because the mean of its divisors is an integer number (40927496751750).

Almost surely, 2^{163320201323231} is an apocalyptic number.

163320201323231 is a deficient number, since it is larger than the sum of its proper divisors (389785683769).

163320201323231 is an equidigital number, since it uses as much as digits as its factorization.

163320201323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389785683768.

The product of its (nonzero) digits is 23328, while the sum is 32.

Adding to 163320201323231 its reverse (132323102023361), we get a palindrome (295643303346592).

The spelling of 163320201323231 in words is "one hundred sixty-three trillion, three hundred twenty billion, two hundred one million, three hundred twenty-three thousand, two hundred thirty-one".