9221566 has 4 divisors (see below), whose sum is σ = 13832352. Its totient is φ = 4610782.

The previous prime is 9221519. The next prime is 9221567. The reversal of 9221566 is 6651229.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6651229 = 13 ⋅511633.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9221567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2305390 + ... + 2305393.

It is an arithmetic number, because the mean of its divisors is an integer number (3458088).

Almost surely, 2^9221566 is an apocalyptic number.

9221566 is a deficient number, since it is larger than the sum of its proper divisors (4610786).

9221566 is a wasteful number, since it uses less digits than its factorization.

9221566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4610785.

The product of its digits is 6480, while the sum is 31.

The square root of 9221566 is about 3036.7031465061. The cubic root of 9221566 is about 209.7015109319.

The spelling of 9221566 in words is "nine million, two hundred twenty-one thousand, five hundred sixty-six".