223320311220 has 96 divisors (see below), whose sum is σ = 637920178560. Its totient is φ = 58361712640.

The previous prime is 223320311213. The next prime is 223320311243. The reversal of 223320311220 is 22113023322.

It is a happy number.

It is a super-2 number, since 2×223320311220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 418375 + ... + 788465.

It is an arithmetic number, because the mean of its divisors is an integer number (6645001860).

Almost surely, 2^223320311220 is an apocalyptic number.

223320311220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223320311220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318960089280).

223320311220 is an abundant number, since it is smaller than the sum of its proper divisors (414599867340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223320311220 is a wasteful number, since it uses less digits than its factorization.

223320311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370305 (or 370303 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 223320311220 its reverse (22113023322), we get a palindrome (245433334542).

The spelling of 223320311220 in words is "two hundred twenty-three billion, three hundred twenty million, three hundred eleven thousand, two hundred twenty".