1003331220 has 96 divisors (see below), whose sum is σ = 2897263488. Its totient is φ = 259241472.

The previous prime is 1003331209. The next prime is 1003331221. The reversal of 1003331220 is 221333001.

1003331220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 1003331220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003331221) 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, 627462 + ... + 629058.

It is an arithmetic number, because the mean of its divisors is an integer number (30179828).

Almost surely, 2^1003331220 is an apocalyptic number.

1003331220 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 1003331220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448631744).

1003331220 is an abundant number, since it is smaller than the sum of its proper divisors (1893932268).

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

1003331220 is a wasteful number, since it uses less digits than its factorization.

1003331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1003331220 is about 31675.4040226798. The cubic root of 1003331220 is about 1001.1091759405.

Adding to 1003331220 its reverse (221333001), we get a palindrome (1224664221).

The spelling of 1003331220 in words is "one billion, three million, three hundred thirty-one thousand, two hundred twenty".