51000100055 has 4 divisors (see below), whose sum is σ = 61200120072. Its totient is φ = 40800080040.

The previous prime is 51000100049. The next prime is 51000100069. The reversal of 51000100055 is 55000100015.

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

It is a de Polignac number, because none of the positive numbers 2^k-51000100055 is a prime.

It is a super-2 number, since 2×51000100055² (a number of 22 digits) contains 22 as substring.

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, 5100010001 + ... + 5100010010.

It is an arithmetic number, because the mean of its divisors is an integer number (15300030018).

Almost surely, 2^51000100055 is an apocalyptic number.

51000100055 is a deficient number, since it is larger than the sum of its proper divisors (10200020017).

51000100055 is a wasteful number, since it uses less digits than its factorization.

51000100055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10200020016.

The product of its (nonzero) digits is 125, while the sum is 17.

The spelling of 51000100055 in words is "fifty-one billion, one hundred thousand, fifty-five".