51011100055 has 4 divisors (see below), whose sum is σ = 61213320072. Its totient is φ = 40808880040.

The previous prime is 51011100037. The next prime is 51011100121. The reversal of 51011100055 is 55000111015.

It is a happy number.

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

It is not a de Polignac number, because 51011100055 - 2¹¹ = 51011098007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5101110001 + ... + 5101110010.

It is an arithmetic number, because the mean of its divisors is an integer number (15303330018).

Almost surely, 2^51011100055 is an apocalyptic number.

51011100055 is a deficient number, since it is larger than the sum of its proper divisors (10202220017).

51011100055 is a wasteful number, since it uses less digits than its factorization.

51011100055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10202220016.

The product of its (nonzero) digits is 125, while the sum is 19.

The spelling of 51011100055 in words is "fifty-one billion, eleven million, one hundred thousand, fifty-five".