9228021 has 8 divisors (see below), whose sum is σ = 13422624. Its totient is φ = 5592720.

The previous prime is 9227983. The next prime is 9228031. The reversal of 9228021 is 1208229.

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

It is not a de Polignac number, because 9228021 - 2¹⁵ = 9195253 is a prime.

It is a Curzon number.

9228021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9227982 and 9228000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9228031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139786 + ... + 139851.

It is an arithmetic number, because the mean of its divisors is an integer number (1677828).

Almost surely, 2^9228021 is an apocalyptic number.

It is an amenable number.

9228021 is a deficient number, since it is larger than the sum of its proper divisors (4194603).

9228021 is a wasteful number, since it uses less digits than its factorization.

9228021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279651.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 9228021 is about 3037.7657908404. The cubic root of 9228021 is about 209.7504291429.

The spelling of 9228021 in words is "nine million, two hundred twenty-eight thousand, twenty-one".