2551401520 has 20 divisors (see below), whose sum is σ = 5932008720. Its totient is φ = 1020560576.

The previous prime is 2551401511. The next prime is 2551401539. The reversal of 2551401520 is 251041552.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15946180 + ... + 15946339.

It is an arithmetic number, because the mean of its divisors is an integer number (296600436).

Almost surely, 2^2551401520 is an apocalyptic number.

2551401520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551401520 is an abundant number, since it is smaller than the sum of its proper divisors (3380607200).

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

2551401520 is a wasteful number, since it uses less digits than its factorization.

2551401520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31892532 (or 31892526 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 2551401520 is about 50511.3999014084. The cubic root of 2551401520 is about 1366.4474566780.

The spelling of 2551401520 in words is "two billion, five hundred fifty-one million, four hundred one thousand, five hundred twenty".