5320097721 has 27 divisors (see below), whose sum is σ = 7889890957. Its totient is φ = 3454391040.

The previous prime is 5320097701. The next prime is 5320097749. The reversal of 5320097721 is 1277900235.

The square root of 5320097721 is 72939.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 998876025 + 4321221696 = 31605^2 + 65736^2 .

It is not a de Polignac number, because 5320097721 - 2¹¹ = 5320095673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5320097701) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8971201 + ... + 8971793.

Almost surely, 2^5320097721 is an apocalyptic number.

5320097721 is the 72939-th square number.

5320097721 is the 36470-th centered octagonal number.

It is an amenable number.

5320097721 is a deficient number, since it is larger than the sum of its proper divisors (2569793236).

5320097721 is an frugal number, since it uses more digits than its factorization.

5320097721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The cubic root of 5320097721 is about 1745.7144356883.

Multiplying 5320097721 by its sum of digits (36), we get a square (191523517956 = 437634²).

Adding to 5320097721 its reverse (1277900235), we get a palindrome (6597997956).

The spelling of 5320097721 in words is "five billion, three hundred twenty million, ninety-seven thousand, seven hundred twenty-one".