2551819240 has 32 divisors (see below), whose sum is σ = 5743305000. Its totient is φ = 1020423424.

The previous prime is 2551819217. The next prime is 2551819253. The reversal of 2551819240 is 429181552.

It can be written as a sum of positive squares in 4 ways, for example, as 1473484996 + 1078334244 = 38386^2 + 32838^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2551819240.

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, 166626 + ... + 181294.

Almost surely, 2^2551819240 is an apocalyptic number.

2551819240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551819240 is an abundant number, since it is smaller than the sum of its proper divisors (3191485760).

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

2551819240 is a wasteful number, since it uses less digits than its factorization.

2551819240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19029 (or 19025 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 2551819240 is about 50515.5346403460. The cubic root of 2551819240 is about 1366.5220250123.

The spelling of 2551819240 in words is "two billion, five hundred fifty-one million, eight hundred nineteen thousand, two hundred forty".