9105385221 has 12 divisors (see below), whose sum is σ = 13189913100. Its totient is φ = 6052861440.

The previous prime is 9105385169. The next prime is 9105385259. The reversal of 9105385221 is 1225835019.

It can be written as a sum of positive squares in 2 ways, for example, as 4933517121 + 4171868100 = 70239^2 + 64590^2 .

It is not a de Polignac number, because 9105385221 - 2¹⁸ = 9105123077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9105385021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1446300 + ... + 1452581.

It is an arithmetic number, because the mean of its divisors is an integer number (1099159425).

Almost surely, 2^9105385221 is an apocalyptic number.

It is an amenable number.

9105385221 is a deficient number, since it is larger than the sum of its proper divisors (4084527879).

9105385221 is a wasteful number, since it uses less digits than its factorization.

9105385221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2899236 (or 2899233 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 9105385221 is about 95422.1421945661. The cubic root of 9105385221 is about 2088.1712306453.

The spelling of 9105385221 in words is "nine billion, one hundred five million, three hundred eighty-five thousand, two hundred twenty-one".