51217095015 has 40 divisors (see below), whose sum is σ = 97212067920. Its totient is φ = 25708969728.

The previous prime is 51217094989. The next prime is 51217095043. The reversal of 51217095015 is 51059071215.

It is not a de Polignac number, because 51217095015 - 2¹² = 51217090919 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3712585 + ... + 3726354.

It is an arithmetic number, because the mean of its divisors is an integer number (2430301698).

Almost surely, 2^51217095015 is an apocalyptic number.

51217095015 is a deficient number, since it is larger than the sum of its proper divisors (45994972905).

51217095015 is a wasteful number, since it uses less digits than its factorization.

51217095015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7438973 (or 7438964 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 36.

The spelling of 51217095015 in words is "fifty-one billion, two hundred seventeen million, ninety-five thousand, fifteen".