1223032220 has 12 divisors (see below), whose sum is σ = 2568367704. Its totient is φ = 489212880.

The previous prime is 1223032219. The next prime is 1223032229. The reversal of 1223032220 is 222303221.

It is a super-2 number, since 2×1223032220² = 2991615622316256800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223032229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30575786 + ... + 30575825.

It is an arithmetic number, because the mean of its divisors is an integer number (214030642).

Almost surely, 2^1223032220 is an apocalyptic number.

1223032220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223032220 is an abundant number, since it is smaller than the sum of its proper divisors (1345335484).

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

1223032220 is a wasteful number, since it uses less digits than its factorization.

1223032220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61151620 (or 61151618 counting only the distinct ones).

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

The square root of 1223032220 is about 34971.8775589759. The cubic root of 1223032220 is about 1069.4142483576.

Adding to 1223032220 its reverse (222303221), we get a palindrome (1445335441).

The spelling of 1223032220 in words is "one billion, two hundred twenty-three million, thirty-two thousand, two hundred twenty".