220323233231 has 4 divisors (see below), whose sum is σ = 220343968464. Its totient is φ = 220302498000.

The previous prime is 220323233227. The next prime is 220323233239. The reversal of 220323233231 is 132332323022.

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 220323233231 - 2² = 220323233227 is a prime.

It is a super-2 number, since 2×220323233231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220323233231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220323233239) 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, 10351670 + ... + 10372931.

It is an arithmetic number, because the mean of its divisors is an integer number (55085992116).

Almost surely, 2^220323233231 is an apocalyptic number.

220323233231 is a deficient number, since it is larger than the sum of its proper divisors (20735233).

220323233231 is a wasteful number, since it uses less digits than its factorization.

220323233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20735232.

The product of its (nonzero) digits is 7776, while the sum is 26.

Adding to 220323233231 its reverse (132332323022), we get a palindrome (352655556253).

The spelling of 220323233231 in words is "two hundred twenty billion, three hundred twenty-three million, two hundred thirty-three thousand, two hundred thirty-one".