2551205505 has 16 divisors (see below), whose sum is σ = 4090322304. Its totient is φ = 1357845120.

The previous prime is 2551205491. The next prime is 2551205507. The reversal of 2551205505 is 5055021552.

It is not a de Polignac number, because 2551205505 - 2⁵ = 2551205473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2551205507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167316 + ... + 181925.

It is an arithmetic number, because the mean of its divisors is an integer number (255645144).

Almost surely, 2^2551205505 is an apocalyptic number.

It is an amenable number.

2551205505 is a deficient number, since it is larger than the sum of its proper divisors (1539116799).

2551205505 is a wasteful number, since it uses less digits than its factorization.

2551205505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349736.

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 2551205505 is about 50509.4595595716. The cubic root of 2551205505 is about 1366.4124627011.

The spelling of 2551205505 in words is "two billion, five hundred fifty-one million, two hundred five thousand, five hundred five".