9226530721 has 4 divisors (see below), whose sum is σ = 9226750000. Its totient is φ = 9226311444.

The previous prime is 9226530697. The next prime is 9226530737. The reversal of 9226530721 is 1270356229.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1270356229 = 17 ⋅74726837.

It is a cyclic number.

It is not a de Polignac number, because 9226530721 - 2¹¹ = 9226528673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9226500721) 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, 24471 + ... + 138028.

It is an arithmetic number, because the mean of its divisors is an integer number (2306687500).

Almost surely, 2^9226530721 is an apocalyptic number.

It is an amenable number.

9226530721 is a deficient number, since it is larger than the sum of its proper divisors (219279).

9226530721 is a wasteful number, since it uses less digits than its factorization.

9226530721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219278.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 9226530721 is about 96054.8318461909. The cubic root of 9226530721 is about 2097.3913732176.

The spelling of 9226530721 in words is "nine billion, two hundred twenty-six million, five hundred thirty thousand, seven hundred twenty-one".