5133395721 has 4 divisors (see below), whose sum is σ = 6844527632. Its totient is φ = 3422263812.

The previous prime is 5133395689. The next prime is 5133395723. The reversal of 5133395721 is 1275933315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5133395721 - 2⁵ = 5133395689 is a prime.

It is a super-2 number, since 2×5133395721² = 52703503256762219682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5133395721.

It is not an unprimeable number, because it can be changed into a prime (5133395723) 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 3 ways as a sum of consecutive naturals, for example, 855565951 + ... + 855565956.

It is an arithmetic number, because the mean of its divisors is an integer number (1711131908).

Almost surely, 2^5133395721 is an apocalyptic number.

It is an amenable number.

5133395721 is a deficient number, since it is larger than the sum of its proper divisors (1711131911).

5133395721 is a wasteful number, since it uses less digits than its factorization.

5133395721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711131910.

The product of its digits is 85050, while the sum is 39.

The square root of 5133395721 is about 71647.7195799001. The cubic root of 5133395721 is about 1725.0495787473.

The spelling of 5133395721 in words is "five billion, one hundred thirty-three million, three hundred ninety-five thousand, seven hundred twenty-one".