7235221 has 4 divisors (see below), whose sum is σ = 8268832. Its totient is φ = 6201612.

The previous prime is 7235209. The next prime is 7235237. The reversal of 7235221 is 1225327.

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.

It is a cyclic number.

It is not a de Polignac number, because 7235221 - 2⁹ = 7234709 is a prime.

It is a Duffinian number.

7235221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7235192 and 7235201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7235201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516795 + ... + 516808.

It is an arithmetic number, because the mean of its divisors is an integer number (2067208).

Almost surely, 2^7235221 is an apocalyptic number.

It is an amenable number.

7235221 is a deficient number, since it is larger than the sum of its proper divisors (1033611).

7235221 is a wasteful number, since it uses less digits than its factorization.

7235221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033610.

The product of its digits is 840, while the sum is 22.

The square root of 7235221 is about 2689.8366121384. The cubic root of 7235221 is about 193.4122306469.

The spelling of 7235221 in words is "seven million, two hundred thirty-five thousand, two hundred twenty-one".