5171821 has 8 divisors (see below), whose sum is σ = 5264384. Its totient is φ = 5080320.

The previous prime is 5171809. The next prime is 5171839. The reversal of 5171821 is 1281715.

5171821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 5171821 - 2⁷ = 5171693 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 (5171801) 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, 24406 + ... + 24616.

It is an arithmetic number, because the mean of its divisors is an integer number (658048).

Almost surely, 2^5171821 is an apocalyptic number.

It is an amenable number.

5171821 is a deficient number, since it is larger than the sum of its proper divisors (92563).

5171821 is a wasteful number, since it uses less digits than its factorization.

5171821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531.

The product of its digits is 560, while the sum is 25.

The square root of 5171821 is about 2274.1638023678. The cubic root of 5171821 is about 172.9343085370.

The spelling of 5171821 in words is "five million, one hundred seventy-one thousand, eight hundred twenty-one".