51102841385 has 16 divisors (see below), whose sum is σ = 61970308752. Its totient is φ = 40453171200.

The previous prime is 51102841369. The next prime is 51102841393. The reversal of 51102841385 is 58314820115.

It can be written as a sum of positive squares in 8 ways, for example, as 895924624 + 50206916761 = 29932^2 + 224069^2 .

It is not a de Polignac number, because 51102841385 - 2⁴ = 51102841369 is a prime.

It is a super-2 number, since 2×51102841385² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (38) 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 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 15 ways as a sum of consecutive naturals, for example, 54125 + ... + 324245.

It is an arithmetic number, because the mean of its divisors is an integer number (3873144297).

Almost surely, 2^51102841385 is an apocalyptic number.

It is an amenable number.

51102841385 is a deficient number, since it is larger than the sum of its proper divisors (10867467367).

51102841385 is a wasteful number, since it uses less digits than its factorization.

51102841385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270524.

The product of its (nonzero) digits is 38400, while the sum is 38.

The spelling of 51102841385 in words is "fifty-one billion, one hundred two million, eight hundred forty-one thousand, three hundred eighty-five".