1223233220 has 48 divisors (see below), whose sum is σ = 2830113216. Its totient is φ = 440400000.

The previous prime is 1223233199. The next prime is 1223233259. The reversal of 1223233220 is 223323221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1223233192 and 1223233201.

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 15 ways as a sum of consecutive naturals, for example, 5306 + ... + 49745.

It is an arithmetic number, because the mean of its divisors is an integer number (58960692).

Almost surely, 2^1223233220 is an apocalyptic number.

1223233220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223233220 is an abundant number, since it is smaller than the sum of its proper divisors (1606879996).

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

1223233220 is a wasteful number, since it uses less digits than its factorization.

1223233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55172 (or 55170 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 1223233220 is about 34974.7511785288. The cubic root of 1223233220 is about 1069.4728296678.

Adding to 1223233220 its reverse (223323221), we get a palindrome (1446556441).

Subtracting from 1223233220 its reverse (223323221), we obtain a palindrome (999909999).

It can be divided in two parts, 12 and 23233220, that added together give a palindrome (23233232).

The spelling of 1223233220 in words is "one billion, two hundred twenty-three million, two hundred thirty-three thousand, two hundred twenty".