5171721023 has 12 divisors (see below), whose sum is σ = 6020867592. Its totient is φ = 4429378800.

The previous prime is 5171721019. The next prime is 5171721029. The reversal of 5171721023 is 3201271715.

It is not a de Polignac number, because 5171721023 - 2² = 5171721019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5171721029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21248 + ... + 103898.

It is an arithmetic number, because the mean of its divisors is an integer number (501738966).

Almost surely, 2^5171721023 is an apocalyptic number.

5171721023 is a deficient number, since it is larger than the sum of its proper divisors (849146569).

5171721023 is a wasteful number, since it uses less digits than its factorization.

5171721023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83942 (or 83935 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 5171721023 is about 71914.6787728347. The cubic root of 5171721023 is about 1729.3319419284.

Adding to 5171721023 its reverse (3201271715), we get a palindrome (8372992738).

The spelling of 5171721023 in words is "five billion, one hundred seventy-one million, seven hundred twenty-one thousand, twenty-three".