51712221715 has 128 divisors (see below), whose sum is σ = 83846430720. Its totient is φ = 29634508800.

The previous prime is 51712221713. The next prime is 51712221751.

51712221715 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51712221715 - 2¹ = 51712221713 is a prime.

It is a super-3 number, since 3×51712221715³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51712221713) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 53256180 + ... + 53257150.

It is an arithmetic number, because the mean of its divisors is an integer number (655050240).

Almost surely, 2^51712221715 is an apocalyptic number.

51712221715 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51712221715 is a deficient number, since it is larger than the sum of its proper divisors (32134209005).

51712221715 is a wasteful number, since it uses less digits than its factorization.

51712221715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193.

The product of its digits is 9800, while the sum is 34.

The spelling of 51712221715 in words is "fifty-one billion, seven hundred twelve million, two hundred twenty-one thousand, seven hundred fifteen".