1223203220 has 24 divisors (see below), whose sum is σ = 2569644000. Its totient is φ = 489106592.

The previous prime is 1223203217. The next prime is 1223203231. The reversal of 1223203220 is 223023221.

It is a super-2 number, since 2×1223203220² = 2992452234836736800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56711 + ... + 75249.

It is an arithmetic number, because the mean of its divisors is an integer number (107068500).

Almost surely, 2^1223203220 is an apocalyptic number.

1223203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223203220 is an abundant number, since it is smaller than the sum of its proper divisors (1346440780).

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

1223203220 is a wasteful number, since it uses less digits than its factorization.

1223203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21847 (or 21845 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1223203220 is about 34974.3222950781. The cubic root of 1223203220 is about 1069.4640865961.

Adding to 1223203220 its reverse (223023221), we get a palindrome (1446226441).

The spelling of 1223203220 in words is "one billion, two hundred twenty-three million, two hundred three thousand, two hundred twenty".