220331231329 has 4 divisors (see below), whose sum is σ = 240361343280. Its totient is φ = 200301119380.

The previous prime is 220331231317. The next prime is 220331231363. The reversal of 220331231329 is 923132133022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220331231329 - 2⁹ = 220331230817 is a prime.

It is a super-2 number, since 2×220331231329² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 220331231329.

It is not an unprimeable number, because it can be changed into a prime (220331231399) 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, 10015055959 + ... + 10015055980.

It is an arithmetic number, because the mean of its divisors is an integer number (60090335820).

Almost surely, 2^220331231329 is an apocalyptic number.

It is an amenable number.

220331231329 is a deficient number, since it is larger than the sum of its proper divisors (20030111951).

220331231329 is a wasteful number, since it uses less digits than its factorization.

220331231329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20030111950.

The product of its (nonzero) digits is 11664, while the sum is 31.

The spelling of 220331231329 in words is "two hundred twenty billion, three hundred thirty-one million, two hundred thirty-one thousand, three hundred twenty-nine".