8733221 has 12 divisors (see below), whose sum is σ = 10435788. Its totient is φ = 7281792.

The previous prime is 8733173. The next prime is 8733247. The reversal of 8733221 is 1223378.

It can be written as a sum of positive squares in 2 ways, for example, as 4264225 + 4468996 = 2065^2 + 2114^2 .

It is not a de Polignac number, because 8733221 - 2⁶ = 8733157 is a prime.

It is a Duffinian number.

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 (8733251) 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, 596 + ... + 4221.

It is an arithmetic number, because the mean of its divisors is an integer number (869649).

Almost surely, 2^8733221 is an apocalyptic number.

It is an amenable number.

8733221 is a deficient number, since it is larger than the sum of its proper divisors (1702567).

8733221 is a wasteful number, since it uses less digits than its factorization.

8733221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4868 (or 4861 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 8733221 is about 2955.2023619373. The cubic root of 8733221 is about 205.9324644294.

Adding to 8733221 its reverse (1223378), we get a palindrome (9956599).

The spelling of 8733221 in words is "eight million, seven hundred thirty-three thousand, two hundred twenty-one".