2551255540 has 24 divisors (see below), whose sum is σ = 5358689280. Its totient is φ = 1020301728.

The previous prime is 2551255537. The next prime is 2551255543. The reversal of 2551255540 is 455521552.

It is an interprime number because it is at equal distance from previous prime (2551255537) and next prime (2551255543).

It is a junction number, because it is equal to n+sod(n) for n = 2551255496 and 2551255505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551255543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133081 + ... + 151039.

It is an arithmetic number, because the mean of its divisors is an integer number (223278720).

Almost surely, 2^2551255540 is an apocalyptic number.

2551255540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551255540 is an abundant number, since it is smaller than the sum of its proper divisors (2807433740).

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

2551255540 is a wasteful number, since it uses less digits than its factorization.

2551255540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25071 (or 25069 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 34.

The square root of 2551255540 is about 50509.9548604035. The cubic root of 2551255540 is about 1366.4213954717.

The spelling of 2551255540 in words is "two billion, five hundred fifty-one million, two hundred fifty-five thousand, five hundred forty".