51271617215 has 48 divisors (see below), whose sum is σ = 78340298400. Its totient is φ = 31921102080.

The previous prime is 51271617203. The next prime is 51271617223.

51271617215 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51271617215 - 2³⁰ = 50197875391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62336 + ... + 326234.

It is an arithmetic number, because the mean of its divisors is an integer number (1632089550).

Almost surely, 2^51271617215 is an apocalyptic number.

51271617215 is a deficient number, since it is larger than the sum of its proper divisors (27068681185).

51271617215 is a wasteful number, since it uses less digits than its factorization.

51271617215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263992 (or 263985 counting only the distinct ones).

The product of its digits is 29400, while the sum is 38.

The spelling of 51271617215 in words is "fifty-one billion, two hundred seventy-one million, six hundred seventeen thousand, two hundred fifteen".