5235441721 has 4 divisors (see below), whose sum is σ = 5239289844. Its totient is φ = 5231593600.

The previous prime is 5235441689. The next prime is 5235441751. The reversal of 5235441721 is 1271445325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1747240000 + 3488201721 = 41800^2 + 59061^2 .

It is a cyclic number.

It is not a de Polignac number, because 5235441721 - 2⁵ = 5235441689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5235441751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1922020 + ... + 1924741.

It is an arithmetic number, because the mean of its divisors is an integer number (1309822461).

Almost surely, 2^5235441721 is an apocalyptic number.

It is an amenable number.

5235441721 is a deficient number, since it is larger than the sum of its proper divisors (3848123).

5235441721 is a wasteful number, since it uses less digits than its factorization.

5235441721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3848122.

The product of its digits is 33600, while the sum is 34.

The square root of 5235441721 is about 72356.3523196132. The cubic root of 5235441721 is about 1736.4053283527.

The spelling of 5235441721 in words is "five billion, two hundred thirty-five million, four hundred forty-one thousand, seven hundred twenty-one".