51715072201 has 4 divisors (see below), whose sum is σ = 55693154692. Its totient is φ = 47736989712.

The previous prime is 51715072163. The next prime is 51715072217. The reversal of 51715072201 is 10227051715.

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 20370140176 + 31344932025 = 142724^2 + 177045^2 .

It is a cyclic number.

It is not a de Polignac number, because 51715072201 - 2²¹ = 51712975049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51715072261) 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, 1989041226 + ... + 1989041251.

It is an arithmetic number, because the mean of its divisors is an integer number (13923288673).

Almost surely, 2^51715072201 is an apocalyptic number.

It is an amenable number.

51715072201 is a deficient number, since it is larger than the sum of its proper divisors (3978082491).

51715072201 is a wasteful number, since it uses less digits than its factorization.

51715072201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3978082490.

The product of its (nonzero) digits is 4900, while the sum is 31.

The spelling of 51715072201 in words is "fifty-one billion, seven hundred fifteen million, seventy-two thousand, two hundred one".