220523323321 has 12 divisors (see below), whose sum is σ = 260418809856. Its totient is φ = 182922566760.

The previous prime is 220523323309. The next prime is 220523323327. The reversal of 220523323321 is 123323325022.

It is a happy number.

It is not a de Polignac number, because 220523323321 - 2⁹ = 220523322809 is a prime.

It is a super-2 number, since 2×220523323321² (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 220523323321.

It is not an unprimeable number, because it can be changed into a prime (220523323327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16384185 + ... + 16397638.

It is an arithmetic number, because the mean of its divisors is an integer number (21701567488).

Almost surely, 2^220523323321 is an apocalyptic number.

It is an amenable number.

220523323321 is a deficient number, since it is larger than the sum of its proper divisors (39895486535).

220523323321 is an equidigital number, since it uses as much as digits as its factorization.

220523323321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32781892 (or 32781861 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 220523323321 its reverse (123323325022), we get a palindrome (343846648343).

The spelling of 220523323321 in words is "two hundred twenty billion, five hundred twenty-three million, three hundred twenty-three thousand, three hundred twenty-one".