51086123706521 has 8 divisors (see below), whose sum is σ = 53308011914304. Its totient is φ = 48864298198320.

The previous prime is 51086123706503. The next prime is 51086123706533. The reversal of 51086123706521 is 12560732168015.

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 51086123706521 - 2²⁶ = 51086056597657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51086123706571) 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, 14006126 + ... + 17272631.

It is an arithmetic number, because the mean of its divisors is an integer number (6663501489288).

Almost surely, 2^{51086123706521} is an apocalyptic number.

It is an amenable number.

51086123706521 is a deficient number, since it is larger than the sum of its proper divisors (2221888207783).

51086123706521 is a wasteful number, since it uses less digits than its factorization.

51086123706521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31349791.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 51086123706521 in words is "fifty-one trillion, eighty-six billion, one hundred twenty-three million, seven hundred six thousand, five hundred twenty-one".