9775221 has 8 divisors (see below), whose sum is σ = 13800384. Its totient is φ = 6133440.

The previous prime is 9775219. The next prime is 9775231. The reversal of 9775221 is 1225779.

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

It is not a de Polignac number, because 9775221 - 2¹ = 9775219 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9775231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95785 + ... + 95886.

It is an arithmetic number, because the mean of its divisors is an integer number (1725048).

Almost surely, 2^9775221 is an apocalyptic number.

It is an amenable number.

9775221 is a deficient number, since it is larger than the sum of its proper divisors (4025163).

9775221 is a wasteful number, since it uses less digits than its factorization.

9775221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191691.

The product of its digits is 8820, while the sum is 33.

The square root of 9775221 is about 3126.5349830123. The cubic root of 9775221 is about 213.8169818465.

The spelling of 9775221 in words is "nine million, seven hundred seventy-five thousand, two hundred twenty-one".