1103243220 has 192 divisors, whose sum is σ = 3712988160. Its totient is φ = 270895104.

The previous prime is 1103243209. The next prime is 1103243257. The reversal of 1103243220 is 223423011.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1103243193 and 1103243202.

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 63 ways as a sum of consecutive naturals, for example, 430182 + ... + 432738.

It is an arithmetic number, because the mean of its divisors is an integer number (19338480).

Almost surely, 2^1103243220 is an apocalyptic number.

1103243220 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 1103243220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1856494080).

1103243220 is an abundant number, since it is smaller than the sum of its proper divisors (2609744940).

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

1103243220 is a wasteful number, since it uses less digits than its factorization.

1103243220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639 (or 2631 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1103243220 is about 33215.1052986439. The cubic root of 1103243220 is about 1033.2936386648.

Adding to 1103243220 its reverse (223423011), we get a palindrome (1326666231).

The spelling of 1103243220 in words is "one billion, one hundred three million, two hundred forty-three thousand, two hundred twenty".