2551400550 has 72 divisors (see below), whose sum is σ = 6885235656. Its totient is φ = 677349120.

The previous prime is 2551400539. The next prime is 2551400567. The reversal of 2551400550 is 550041552.

2551400550 is a `hidden beast` number, since 25 + 51 + 40 + 0 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 89662 + ... + 114638.

It is an arithmetic number, because the mean of its divisors is an integer number (95628273).

Almost surely, 2^2551400550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2551400550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3442617828).

2551400550 is an abundant number, since it is smaller than the sum of its proper divisors (4333835106).

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

2551400550 is a wasteful number, since it uses less digits than its factorization.

2551400550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25222 (or 25214 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 2551400550 is about 50511.3902996146. The cubic root of 2551400550 is about 1366.4472835112.

The spelling of 2551400550 in words is "two billion, five hundred fifty-one million, four hundred thousand, five hundred fifty".