51100111005 has 8 divisors (see below), whose sum is σ = 81760177632. Its totient is φ = 27253392528.

The previous prime is 51100111003. The next prime is 51100111009. The reversal of 51100111005 is 50011100115.

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

It is not a de Polignac number, because 51100111005 - 2¹ = 51100111003 is a prime.

It is a super-2 number, since 2×51100111005² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 3406674067 = 51100111005 / (5 + 1 + 1 + 0 + 0 + 1 + 1 + 1 + 0 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51100111003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1703337019 + ... + 1703337048.

It is an arithmetic number, because the mean of its divisors is an integer number (10220022204).

Almost surely, 2^51100111005 is an apocalyptic number.

It is an amenable number.

51100111005 is a deficient number, since it is larger than the sum of its proper divisors (30660066627).

51100111005 is a wasteful number, since it uses less digits than its factorization.

51100111005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406674075.

The product of its (nonzero) digits is 25, while the sum is 15.

The spelling of 51100111005 in words is "fifty-one billion, one hundred million, one hundred eleven thousand, five".