2551251555 has 12 divisors (see below), whose sum is σ = 4422169440. Its totient is φ = 1360667472.

The previous prime is 2551251553. The next prime is 2551251569. The reversal of 2551251555 is 5551521552.

2551251555 is a `hidden beast` number, since 2 + 5 + 51 + 2 + 51 + 555 = 666.

It is not a de Polignac number, because 2551251555 - 2¹ = 2551251553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2551251551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28347195 + ... + 28347284.

It is an arithmetic number, because the mean of its divisors is an integer number (368514120).

Almost surely, 2^2551251555 is an apocalyptic number.

2551251555 is a deficient number, since it is larger than the sum of its proper divisors (1870917885).

2551251555 is a wasteful number, since it uses less digits than its factorization.

2551251555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56694490 (or 56694487 counting only the distinct ones).

The product of its digits is 62500, while the sum is 36.

The square root of 2551251555 is about 50509.9154127187. The cubic root of 2551251555 is about 1366.4206840322.

The spelling of 2551251555 in words is "two billion, five hundred fifty-one million, two hundred fifty-one thousand, five hundred fifty-five".