223020311220 has 144 divisors (see below), whose sum is σ = 780643718400. Its totient is φ = 50481128448.

The previous prime is 223020311207. The next prime is 223020311221. The reversal of 223020311220 is 22113020322.

223020311220 is a `hidden beast` number, since 2 + 230 + 203 + 11 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 223020311193 and 223020311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223020311221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 729445 + ... + 989004.

Almost surely, 2^223020311220 is an apocalyptic number.

223020311220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223020311220 is an abundant number, since it is smaller than the sum of its proper divisors (557623407180).

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

223020311220 is a wasteful number, since it uses less digits than its factorization.

223020311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718574 (or 1718569 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 223020311220 its reverse (22113020322), we get a palindrome (245133331542).

The spelling of 223020311220 in words is "two hundred twenty-three billion, twenty million, three hundred eleven thousand, two hundred twenty".