5271816021 has 8 divisors (see below), whose sum is σ = 7065890304. Its totient is φ = 3496142880.

The previous prime is 5271815987. The next prime is 5271816023. The reversal of 5271816021 is 1206181725.

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

It is not a de Polignac number, because 5271816021 - 2⁷ = 5271815893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5271816023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4599616 + ... + 4600761.

It is an arithmetic number, because the mean of its divisors is an integer number (883236288).

Almost surely, 2^5271816021 is an apocalyptic number.

It is an amenable number.

5271816021 is a deficient number, since it is larger than the sum of its proper divisors (1794074283).

5271816021 is a wasteful number, since it uses less digits than its factorization.

5271816021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9200571.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 5271816021 is about 72607.2725076490. The cubic root of 5271816021 is about 1740.4173945819.

Adding to 5271816021 its reverse (1206181725), we get a palindrome (6477997746).

The spelling of 5271816021 in words is "five billion, two hundred seventy-one million, eight hundred sixteen thousand, twenty-one".