51012016105 has 4 divisors (see below), whose sum is σ = 61214419332. Its totient is φ = 40809612880.

The previous prime is 51012016091. The next prime is 51012016109. The reversal of 51012016105 is 50161021015.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12125753689 + 38886262416 = 110117^2 + 197196^2 .

It is not a de Polignac number, because 51012016105 - 2¹³ = 51012007913 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51012016109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5101201606 + ... + 5101201615.

It is an arithmetic number, because the mean of its divisors is an integer number (15303604833).

Almost surely, 2^51012016105 is an apocalyptic number.

It is an amenable number.

51012016105 is a deficient number, since it is larger than the sum of its proper divisors (10202403227).

51012016105 is a wasteful number, since it uses less digits than its factorization.

51012016105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10202403226.

The product of its (nonzero) digits is 300, while the sum is 22.

The spelling of 51012016105 in words is "fifty-one billion, twelve million, sixteen thousand, one hundred five".