51005551117 has 8 divisors (see below), whose sum is σ = 52174977120. Its totient is φ = 49843794000.

The previous prime is 51005551087. The next prime is 51005551123. The reversal of 51005551117 is 71115550015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51005551117 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 (51005551217) 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 7 ways as a sum of consecutive naturals, for example, 1903767 + ... + 1930372.

It is an arithmetic number, because the mean of its divisors is an integer number (6521872140).

Almost surely, 2^51005551117 is an apocalyptic number.

It is an amenable number.

51005551117 is a deficient number, since it is larger than the sum of its proper divisors (1169426003).

51005551117 is a wasteful number, since it uses less digits than its factorization.

51005551117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834443.

The product of its (nonzero) digits is 4375, while the sum is 31.

The spelling of 51005551117 in words is "fifty-one billion, five million, five hundred fifty-one thousand, one hundred seventeen".