220131240 has 128 divisors (see below), whose sum is σ = 765573120. Its totient is φ = 49593600.

The previous prime is 220131239. The next prime is 220131269. The reversal of 220131240 is 42131022.

220131240 is digitally balanced in base 3, 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57795 + ... + 61485.

It is an arithmetic number, because the mean of its divisors is an integer number (5981040).

Almost surely, 2^220131240 is an apocalyptic number.

220131240 is a gapful number since it is divisible by the number (20) 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 220131240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382786560).

220131240 is an abundant number, since it is smaller than the sum of its proper divisors (545441880).

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

220131240 is a wasteful number, since it uses less digits than its factorization.

220131240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3783 (or 3779 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 220131240 is about 14836.8204140914. The cubic root of 220131240 is about 603.8010908845.

Adding to 220131240 its reverse (42131022), we get a palindrome (262262262).

The spelling of 220131240 in words is "two hundred twenty million, one hundred thirty-one thousand, two hundred forty".