7220447 has 4 divisors (see below), whose sum is σ = 7775880. Its totient is φ = 6665016.

The previous prime is 7220443. The next prime is 7220453. The reversal of 7220447 is 7440227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7220447 - 2² = 7220443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277697 + ... + 277722.

It is an arithmetic number, because the mean of its divisors is an integer number (1943970).

Almost surely, 2^7220447 is an apocalyptic number.

7220447 is a deficient number, since it is larger than the sum of its proper divisors (555433).

7220447 is a wasteful number, since it uses less digits than its factorization.

7220447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555432.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 7220447 is about 2687.0889453087. The cubic root of 7220447 is about 193.2804945443.

It can be divided in two parts, 7220 and 447, that added together give a palindrome (7667).

The spelling of 7220447 in words is "seven million, two hundred twenty thousand, four hundred forty-seven".