2555505551 has 4 divisors (see below), whose sum is σ = 2666614512. Its totient is φ = 2444396592.

The previous prime is 2555505539. The next prime is 2555505559. The reversal of 2555505551 is 1555055552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2555505551 - 2¹⁰ = 2555504527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555505559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55554446 + ... + 55554491.

It is an arithmetic number, because the mean of its divisors is an integer number (666653628).

Almost surely, 2^2555505551 is an apocalyptic number.

2555505551 is a deficient number, since it is larger than the sum of its proper divisors (111108961).

2555505551 is a wasteful number, since it uses less digits than its factorization.

2555505551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111108960.

The product of its (nonzero) digits is 156250, while the sum is 38.

The square root of 2555505551 is about 50552.0083775116. The cubic root of 2555505551 is about 1367.1797259159.

The spelling of 2555505551 in words is "two billion, five hundred fifty-five million, five hundred five thousand, five hundred fifty-one".