51304012217 has 8 divisors (see below), whose sum is σ = 52190176392. Its totient is φ = 50425264000.

The previous prime is 51304012163. The next prime is 51304012219. The reversal of 51304012217 is 71221040315.

It can be written as a sum of positive squares in 4 ways, for example, as 40684503616 + 10619508601 = 201704^2 + 103051^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51304012217 - 2⁸ = 51304011961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51304012219) 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, 1840034 + ... + 1867707.

It is an arithmetic number, because the mean of its divisors is an integer number (6523772049).

Almost surely, 2^51304012217 is an apocalyptic number.

It is an amenable number.

51304012217 is a deficient number, since it is larger than the sum of its proper divisors (886164175).

51304012217 is a wasteful number, since it uses less digits than its factorization.

51304012217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707979.

The product of its (nonzero) digits is 1680, while the sum is 26.

The spelling of 51304012217 in words is "fifty-one billion, three hundred four million, twelve thousand, two hundred seventeen".