5157176721 has 8 divisors (see below), whose sum is σ = 6876875424. Its totient is φ = 3437797920.

The previous prime is 5157176699. The next prime is 5157176747. The reversal of 5157176721 is 1276717515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5157176721 - 2⁶ = 5157176657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5157176221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39420 + ... + 108941.

It is an arithmetic number, because the mean of its divisors is an integer number (859609428).

Almost surely, 2^5157176721 is an apocalyptic number.

It is an amenable number.

5157176721 is a deficient number, since it is larger than the sum of its proper divisors (1719698703).

5157176721 is a wasteful number, since it uses less digits than its factorization.

5157176721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159951.

The product of its digits is 102900, while the sum is 42.

The square root of 5157176721 is about 71813.4856485883. The cubic root of 5157176721 is about 1727.7093008475.

The spelling of 5157176721 in words is "five billion, one hundred fifty-seven million, one hundred seventy-six thousand, seven hundred twenty-one".