2131078240 has 48 divisors (see below), whose sum is σ = 5083591968. Its totient is φ = 844148736.

The previous prime is 2131078223. The next prime is 2131078283. The reversal of 2131078240 is 428701312.

It is a junction number, because it is equal to n+sod(n) for n = 2131078199 and 2131078208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48177 + ... + 81136.

It is an arithmetic number, because the mean of its divisors is an integer number (105908166).

Almost surely, 2^2131078240 is an apocalyptic number.

2131078240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131078240 is an abundant number, since it is smaller than the sum of its proper divisors (2952513728).

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

2131078240 is a wasteful number, since it uses less digits than its factorization.

2131078240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129431 (or 129423 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 2131078240 is about 46163.6029789703. The cubic root of 2131078240 is about 1286.8654219108.

Adding to 2131078240 its reverse (428701312), we get a palindrome (2559779552).

The spelling of 2131078240 in words is "two billion, one hundred thirty-one million, seventy-eight thousand, two hundred forty".