51506551535 has 8 divisors (see below), whose sum is σ = 62590240320. Its totient is φ = 40683655584.

The previous prime is 51506551493. The next prime is 51506551549. The reversal of 51506551535 is 53515560515.

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 51506551535 - 2¹⁶ = 51506485999 is a prime.

It is a super-2 number, since 2×51506551535² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51506551492 and 51506551501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65197772 + ... + 65198561.

It is an arithmetic number, because the mean of its divisors is an integer number (7823780040).

Almost surely, 2^51506551535 is an apocalyptic number.

51506551535 is a deficient number, since it is larger than the sum of its proper divisors (11083688785).

51506551535 is a wasteful number, since it uses less digits than its factorization.

51506551535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130396417.

The product of its (nonzero) digits is 281250, while the sum is 41.

The spelling of 51506551535 in words is "fifty-one billion, five hundred six million, five hundred fifty-one thousand, five hundred thirty-five".