223111220 has 12 divisors (see below), whose sum is σ = 468533604. Its totient is φ = 89244480.

The previous prime is 223111177. The next prime is 223111241. The reversal of 223111220 is 22111322.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 129640996 + 93470224 = 11386^2 + 9668^2 .

It is a super-3 number, since 3×223111220³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223111195 and 223111204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5577761 + ... + 5577800.

It is an arithmetic number, because the mean of its divisors is an integer number (39044467).

Almost surely, 2^223111220 is an apocalyptic number.

223111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223111220 is an abundant number, since it is smaller than the sum of its proper divisors (245422384).

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

223111220 is a wasteful number, since it uses less digits than its factorization.

223111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11155570 (or 11155568 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 223111220 is about 14936.9079799000. The cubic root of 223111220 is about 606.5134976733.

Adding to 223111220 its reverse (22111322), we get a palindrome (245222542).

The spelling of 223111220 in words is "two hundred twenty-three million, one hundred eleven thousand, two hundred twenty".