5365172521 has 8 divisors (see below), whose sum is σ = 5557494600. Its totient is φ = 5173338240.

The previous prime is 5365172513. The next prime is 5365172551. The reversal of 5365172521 is 1252715635.

It can be written as a sum of positive squares in 4 ways, for example, as 68244121 + 5296928400 = 8261^2 + 72780^2 .

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 5365172521 - 2³ = 5365172513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5365172551) 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, 99486 + ... + 143623.

It is an arithmetic number, because the mean of its divisors is an integer number (694686825).

Almost surely, 2^5365172521 is an apocalyptic number.

It is an amenable number.

5365172521 is a deficient number, since it is larger than the sum of its proper divisors (192322079).

5365172521 is a wasteful number, since it uses less digits than its factorization.

5365172521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243899.

The product of its digits is 63000, while the sum is 37.

The square root of 5365172521 is about 73247.3379789327. The cubic root of 5365172521 is about 1750.6307952936.

The spelling of 5365172521 in words is "five billion, three hundred sixty-five million, one hundred seventy-two thousand, five hundred twenty-one".