2131230240 has 72 divisors (see below), whose sum is σ = 7272828108. Its totient is φ = 568327680.

The previous prime is 2131230221. The next prime is 2131230349. The reversal of 2131230240 is 420321312.

It can be written as a sum of positive squares in 2 ways, for example, as 1938464784 + 192765456 = 44028^2 + 13884^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 738571 + ... + 741450.

Almost surely, 2^2131230240 is an apocalyptic number.

2131230240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131230240 is an abundant number, since it is smaller than the sum of its proper divisors (5141597868).

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

2131230240 is a wasteful number, since it uses less digits than its factorization.

2131230240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480042 (or 1480031 counting only the distinct ones).

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

The square root of 2131230240 is about 46165.2492682537. The cubic root of 2131230240 is about 1286.8960165788.

Adding to 2131230240 its reverse (420321312), we get a palindrome (2551551552).

The spelling of 2131230240 in words is "two billion, one hundred thirty-one million, two hundred thirty thousand, two hundred forty".