9220561 has 4 divisors (see below), whose sum is σ = 10537792. Its totient is φ = 7903332.

The previous prime is 9220559. The next prime is 9220573. The reversal of 9220561 is 1650229.

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: 1650229 = 7 ⋅235747.

It is a cyclic number.

It is not a de Polignac number, because 9220561 - 2¹ = 9220559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9220501) 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 3 ways as a sum of consecutive naturals, for example, 658605 + ... + 658618.

It is an arithmetic number, because the mean of its divisors is an integer number (2634448).

Almost surely, 2^9220561 is an apocalyptic number.

It is an amenable number.

9220561 is a deficient number, since it is larger than the sum of its proper divisors (1317231).

9220561 is a wasteful number, since it uses less digits than its factorization.

9220561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317230.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 9220561 is about 3036.5376664879. The cubic root of 9220561 is about 209.6938926425.

The spelling of 9220561 in words is "nine million, two hundred twenty thousand, five hundred sixty-one".