5170571721 has 24 divisors (see below), whose sum is σ = 8696600640. Its totient is φ = 2898863136.

The previous prime is 5170571717. The next prime is 5170571753. The reversal of 5170571721 is 1271750715.

5170571721 is a `hidden beast` number, since 5 + 17 + 0 + 571 + 72 + 1 = 666.

It is not a de Polignac number, because 5170571721 - 2² = 5170571717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5170579721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 770931 + ... + 777608.

It is an arithmetic number, because the mean of its divisors is an integer number (362358360).

Almost surely, 2^5170571721 is an apocalyptic number.

It is an amenable number.

5170571721 is a deficient number, since it is larger than the sum of its proper divisors (3526028919).

5170571721 is a wasteful number, since it uses less digits than its factorization.

5170571721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548605 (or 1548602 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 36.

The square root of 5170571721 is about 71906.6875958002. The cubic root of 5170571721 is about 1729.2038303581.

The spelling of 5170571721 in words is "five billion, one hundred seventy million, five hundred seventy-one thousand, seven hundred twenty-one".