51278887215 has 32 divisors (see below), whose sum is σ = 91266624960. Its totient is φ = 27317492352.

The previous prime is 51278887211. The next prime is 51278887249.

51278887215 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51278887215 - 2² = 51278887211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51278887211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98164 + ... + 334953.

It is an arithmetic number, because the mean of its divisors is an integer number (2852082030).

Almost surely, 2^51278887215 is an apocalyptic number.

51278887215 is a deficient number, since it is larger than the sum of its proper divisors (39987737745).

51278887215 is a wasteful number, since it uses less digits than its factorization.

51278887215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434008 (or 434002 counting only the distinct ones).

The product of its digits is 2508800, while the sum is 54.

The spelling of 51278887215 in words is "fifty-one billion, two hundred seventy-eight million, eight hundred eighty-seven thousand, two hundred fifteen".