1103131320 has 128 divisors (see below), whose sum is σ = 3455403840. Its totient is φ = 281456640.

The previous prime is 1103131307. The next prime is 1103131327. The reversal of 1103131320 is 231313011.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1103131320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103131327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268804 + ... + 272876.

Almost surely, 2^1103131320 is an apocalyptic number.

1103131320 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 1103131320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1727701920).

1103131320 is an abundant number, since it is smaller than the sum of its proper divisors (2352272520).

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

1103131320 is a wasteful number, since it uses less digits than its factorization.

1103131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4185 (or 4181 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1103131320 is about 33213.4207813649. The cubic root of 1103131320 is about 1033.2587024375.

Adding to 1103131320 its reverse (231313011), we get a palindrome (1334444331).

The spelling of 1103131320 in words is "one billion, one hundred three million, one hundred thirty-one thousand, three hundred twenty".