51715200521 has 8 divisors (see below), whose sum is σ = 54443985600. Its totient is φ = 48987108720.

The previous prime is 51715200503. The next prime is 51715200527. The reversal of 51715200521 is 12500251715.

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

It is not a de Polignac number, because 51715200521 - 2⁶ = 51715200457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51715200527) 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, 16550 + ... + 322031.

It is an arithmetic number, because the mean of its divisors is an integer number (6805498200).

Almost surely, 2^51715200521 is an apocalyptic number.

It is an amenable number.

51715200521 is a deficient number, since it is larger than the sum of its proper divisors (2728785079).

51715200521 is a wasteful number, since it uses less digits than its factorization.

51715200521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346639.

The product of its (nonzero) digits is 3500, while the sum is 29.

The spelling of 51715200521 in words is "fifty-one billion, seven hundred fifteen million, two hundred thousand, five hundred twenty-one".