5625267721 has 4 divisors (see below), whose sum is σ = 5819242500. Its totient is φ = 5431292944.

The previous prime is 5625267707. The next prime is 5625267793. The reversal of 5625267721 is 1277625265.

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 3415233600 + 2210034121 = 58440^2 + 47011^2 .

It is a cyclic number.

It is not a de Polignac number, because 5625267721 - 2⁹ = 5625267209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5625265721) 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, 96987346 + ... + 96987403.

It is an arithmetic number, because the mean of its divisors is an integer number (1454810625).

Almost surely, 2^5625267721 is an apocalyptic number.

It is an amenable number.

5625267721 is a deficient number, since it is larger than the sum of its proper divisors (193974779).

5625267721 is a wasteful number, since it uses less digits than its factorization.

5625267721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193974778.

The product of its digits is 352800, while the sum is 43.

The square root of 5625267721 is about 75001.7847854303. The cubic root of 5625267721 is about 1778.4748667613.

The spelling of 5625267721 in words is "five billion, six hundred twenty-five million, two hundred sixty-seven thousand, seven hundred twenty-one".