1223333220 has 96 divisors (see below), whose sum is σ = 3527491968. Its totient is φ = 316541952.

The previous prime is 1223333201. The next prime is 1223333231. The reversal of 1223333220 is 223333221.

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, 1427032 + ... + 1427888.

It is an arithmetic number, because the mean of its divisors is an integer number (36744708).

Almost surely, 2^1223333220 is an apocalyptic number.

1223333220 is a gapful number since it is divisible by the number (10) 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 1223333220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1763745984).

1223333220 is an abundant number, since it is smaller than the sum of its proper divisors (2304158748).

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

1223333220 is a wasteful number, since it uses less digits than its factorization.

1223333220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549 (or 1547 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 1223333220 is about 34976.1807520490. The cubic root of 1223333220 is about 1069.5019722077.

Adding to 1223333220 its reverse (223333221), we get a palindrome (1446666441).

Subtracting from 1223333220 its reverse (223333221), we obtain a palindrome (999999999).

The spelling of 1223333220 in words is "one billion, two hundred twenty-three million, three hundred thirty-three thousand, two hundred twenty".