51321525717 has 16 divisors (see below), whose sum is σ = 85313705472. Its totient is φ = 26660532720.

The previous prime is 51321525701. The next prime is 51321525719. The reversal of 51321525717 is 71752512315.

It is a happy number.

51321525717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51321525717 - 2⁴ = 51321525701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51321525719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111085323 + ... + 111085784.

It is an arithmetic number, because the mean of its divisors is an integer number (5332106592).

Almost surely, 2^51321525717 is an apocalyptic number.

It is an amenable number.

51321525717 is a deficient number, since it is larger than the sum of its proper divisors (33992179755).

51321525717 is a wasteful number, since it uses less digits than its factorization.

51321525717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222171128.

The product of its digits is 73500, while the sum is 39.

The spelling of 51321525717 in words is "fifty-one billion, three hundred twenty-one million, five hundred twenty-five thousand, seven hundred seventeen".