7933221 has 12 divisors (see below), whose sum is σ = 11883872. Its totient is φ = 5288652.

The previous prime is 7933201. The next prime is 7933231. The reversal of 7933221 is 1223397.

It is not a de Polignac number, because 7933221 - 2⁶ = 7933157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7933201) 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 11 ways as a sum of consecutive naturals, for example, 16081 + ... + 16566.

Almost surely, 2^7933221 is an apocalyptic number.

It is an amenable number.

7933221 is a deficient number, since it is larger than the sum of its proper divisors (3950651).

7933221 is an equidigital number, since it uses as much as digits as its factorization.

7933221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32662 (or 32650 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 7933221 is about 2816.5974153223. The cubic root of 7933221 is about 199.4419526976.

Adding to 7933221 its product of digits (2268), we get a square (7935489 = 2817²).

The spelling of 7933221 in words is "seven million, nine hundred thirty-three thousand, two hundred twenty-one".