51165170051 has 4 divisors (see below), whose sum is σ = 52130550672. Its totient is φ = 50199789432.

The previous prime is 51165170009. The next prime is 51165170101. The reversal of 51165170051 is 15007156115.

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

It is a cyclic number.

It is not a de Polignac number, because 51165170051 - 2²⁶ = 51098061187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51165175051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482690231 + ... + 482690336.

It is an arithmetic number, because the mean of its divisors is an integer number (13032637668).

Almost surely, 2^51165170051 is an apocalyptic number.

51165170051 is a deficient number, since it is larger than the sum of its proper divisors (965380621).

51165170051 is an equidigital number, since it uses as much as digits as its factorization.

51165170051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965380620.

The product of its (nonzero) digits is 5250, while the sum is 32.

The spelling of 51165170051 in words is "fifty-one billion, one hundred sixty-five million, one hundred seventy thousand, fifty-one".