4003131220 has 96 divisors (see below), whose sum is σ = 9300977280. Its totient is φ = 1435176960.

The previous prime is 4003131199. The next prime is 4003131221. The reversal of 4003131220 is 221313004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 4003131194 and 4003131203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4003131221) 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, 7035096 + ... + 7035664.

It is an arithmetic number, because the mean of its divisors is an integer number (96885180).

Almost surely, 2^4003131220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4003131220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4650488640).

4003131220 is an abundant number, since it is smaller than the sum of its proper divisors (5297846060).

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

4003131220 is a wasteful number, since it uses less digits than its factorization.

4003131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 4003131220 is about 63270.3028284202. The cubic root of 4003131220 is about 1587.8151524272.

Adding to 4003131220 its reverse (221313004), we get a palindrome (4224444224).

The spelling of 4003131220 in words is "four billion, three million, one hundred thirty-one thousand, two hundred twenty".