5306115721 has 4 divisors (see below), whose sum is σ = 5449524292. Its totient is φ = 5162707152.

The previous prime is 5306115679. The next prime is 5306115733. The reversal of 5306115721 is 1275116035.

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 2794602496 + 2511513225 = 52864^2 + 50115^2 .

It is a cyclic number.

It is not a de Polignac number, because 5306115721 - 2⁷ = 5306115593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5306115751) 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, 71704230 + ... + 71704303.

It is an arithmetic number, because the mean of its divisors is an integer number (1362381073).

Almost surely, 2^5306115721 is an apocalyptic number.

It is an amenable number.

5306115721 is a deficient number, since it is larger than the sum of its proper divisors (143408571).

5306115721 is a wasteful number, since it uses less digits than its factorization.

5306115721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143408570.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 5306115721 is about 72843.0897271663. The cubic root of 5306115721 is about 1744.1837624494.

The spelling of 5306115721 in words is "five billion, three hundred six million, one hundred fifteen thousand, seven hundred twenty-one".