9013216621 has 4 divisors (see below), whose sum is σ = 9543405852. Its totient is φ = 8483027392.

The previous prime is 9013216573. The next prime is 9013216651. The reversal of 9013216621 is 1266123109.

9013216621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3649851396 + 5363365225 = 60414^2 + 73235^2 .

It is a cyclic number.

It is not a de Polignac number, because 9013216621 - 2⁷ = 9013216493 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 (9013216651) 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, 265094590 + ... + 265094623.

It is an arithmetic number, because the mean of its divisors is an integer number (2385851463).

Almost surely, 2^9013216621 is an apocalyptic number.

It is an amenable number.

9013216621 is a deficient number, since it is larger than the sum of its proper divisors (530189231).

9013216621 is a wasteful number, since it uses less digits than its factorization.

9013216621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530189230.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 9013216621 is about 94937.9619593764. The cubic root of 9013216621 is about 2081.1015353928.

The spelling of 9013216621 in words is "nine billion, thirteen million, two hundred sixteen thousand, six hundred twenty-one".