7245587221 has 8 divisors (see below), whose sum is σ = 7746283584. Its totient is φ = 6753167040.

The previous prime is 7245587207. The next prime is 7245587267. The reversal of 7245587221 is 1227855427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7245587221 - 2⁷ = 7245587093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7245587201) 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, 2067235 + ... + 2070736.

It is an arithmetic number, because the mean of its divisors is an integer number (968285448).

Almost surely, 2^7245587221 is an apocalyptic number.

It is an amenable number.

7245587221 is a deficient number, since it is larger than the sum of its proper divisors (500696363).

7245587221 is a wasteful number, since it uses less digits than its factorization.

7245587221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138091.

The product of its digits is 313600, while the sum is 43.

The square root of 7245587221 is about 85121.0151548958. The cubic root of 7245587221 is about 1935.0455665233.

The spelling of 7245587221 in words is "seven billion, two hundred forty-five million, five hundred eighty-seven thousand, two hundred twenty-one".