51501334321 has 8 divisors (see below), whose sum is σ = 51772728744. Its totient is φ = 51230040960.

The previous prime is 51501334273. The next prime is 51501334331. The reversal of 51501334321 is 12343310515.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22579570225 + 28921764096 = 150265^2 + 170064^2 .

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 51501334321 - 2⁷ = 51501334193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51501334321.

It is not an unprimeable number, because it can be changed into a prime (51501334331) 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, 1136331 + ... + 1180783.

It is an arithmetic number, because the mean of its divisors is an integer number (6471591093).

Almost surely, 2^51501334321 is an apocalyptic number.

It is an amenable number.

51501334321 is a deficient number, since it is larger than the sum of its proper divisors (271394423).

51501334321 is a wasteful number, since it uses less digits than its factorization.

51501334321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50531.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 51501334321 its reverse (12343310515), we get a palindrome (63844644836).

The spelling of 51501334321 in words is "fifty-one billion, five hundred one million, three hundred thirty-four thousand, three hundred twenty-one".