51550500055 has 4 divisors (see below), whose sum is σ = 61860600072. Its totient is φ = 41240400040.

The previous prime is 51550500041. The next prime is 51550500203. The reversal of 51550500055 is 55000505515.

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

It is not a de Polignac number, because 51550500055 - 2⁷ = 51550499927 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 5155050001 + ... + 5155050010.

It is an arithmetic number, because the mean of its divisors is an integer number (15465150018).

Almost surely, 2^51550500055 is an apocalyptic number.

51550500055 is a deficient number, since it is larger than the sum of its proper divisors (10310100017).

51550500055 is a wasteful number, since it uses less digits than its factorization.

51550500055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10310100016.

The product of its (nonzero) digits is 15625, while the sum is 31.

The spelling of 51550500055 in words is "fifty-one billion, five hundred fifty million, five hundred thousand, fifty-five".