7200221 has 16 divisors (see below), whose sum is σ = 8870400. Its totient is φ = 5706288.

The previous prime is 7200217. The next prime is 7200223. The reversal of 7200221 is 1220027.

It is not a de Polignac number, because 7200221 - 2² = 7200217 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 7200196 and 7200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7200223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5090 + ... + 6348.

It is an arithmetic number, because the mean of its divisors is an integer number (554400).

Almost surely, 2^7200221 is an apocalyptic number.

It is an amenable number.

7200221 is a deficient number, since it is larger than the sum of its proper divisors (1670179).

7200221 is a wasteful number, since it uses less digits than its factorization.

7200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 7200221 is about 2683.3227536023. The cubic root of 7200221 is about 193.0998525783.

Adding to 7200221 its reverse (1220027), we get a palindrome (8420248).

The spelling of 7200221 in words is "seven million, two hundred thousand, two hundred twenty-one".