51321505713 has 8 divisors (see below), whose sum is σ = 68457399168. Its totient is φ = 34199974704.

The previous prime is 51321505687. The next prime is 51321505759. The reversal of 51321505713 is 31750512315.

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

It is not a de Polignac number, because 51321505713 - 2¹² = 51321501617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51328505713) 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, 3582270 + ... + 3596567.

It is an arithmetic number, because the mean of its divisors is an integer number (8557174896).

Almost surely, 2^51321505713 is an apocalyptic number.

It is an amenable number.

51321505713 is a deficient number, since it is larger than the sum of its proper divisors (17135893455).

51321505713 is a wasteful number, since it uses less digits than its factorization.

51321505713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7181223.

The product of its (nonzero) digits is 15750, while the sum is 33.

The spelling of 51321505713 in words is "fifty-one billion, three hundred twenty-one million, five hundred five thousand, seven hundred thirteen".