2551547920 has 20 divisors (see below), whose sum is σ = 5932349100. Its totient is φ = 1020619136.

The previous prime is 2551547881. The next prime is 2551547939. The reversal of 2551547920 is 297451552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1629575424 + 921972496 = 40368^2 + 30364^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15947095 + ... + 15947254.

It is an arithmetic number, because the mean of its divisors is an integer number (296617455).

Almost surely, 2^2551547920 is an apocalyptic number.

2551547920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551547920 is an abundant number, since it is smaller than the sum of its proper divisors (3380801180).

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

2551547920 is a wasteful number, since it uses less digits than its factorization.

2551547920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31894362 (or 31894356 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 40.

The square root of 2551547920 is about 50512.8490584326. The cubic root of 2551547920 is about 1366.4735918668.

The spelling of 2551547920 in words is "two billion, five hundred fifty-one million, five hundred forty-seven thousand, nine hundred twenty".