9249287221 has 8 divisors (see below), whose sum is σ = 9519557184. Its totient is φ = 8982906240.

The previous prime is 9249287171. The next prime is 9249287233. The reversal of 9249287221 is 1227829429.

9249287221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9249287221 - 2¹⁵ = 9249254453 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 (9249287921) 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 7 ways as a sum of consecutive naturals, for example, 967420 + ... + 976933.

It is an arithmetic number, because the mean of its divisors is an integer number (1189944648).

Almost surely, 2^9249287221 is an apocalyptic number.

It is an amenable number.

9249287221 is a deficient number, since it is larger than the sum of its proper divisors (270269963).

9249287221 is a wasteful number, since it uses less digits than its factorization.

9249287221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944491.

The product of its digits is 290304, while the sum is 46.

The square root of 9249287221 is about 96173.2146753970. The cubic root of 9249287221 is about 2099.1143068515.

The spelling of 9249287221 in words is "nine billion, two hundred forty-nine million, two hundred eighty-seven thousand, two hundred twenty-one".