7221497 has 4 divisors (see below), whose sum is σ = 7230336. Its totient is φ = 7212660.

The previous prime is 7221457. The next prime is 7221499. The reversal of 7221497 is 7941227.

7221497 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7221497 - 2¹⁶ = 7155961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7221499) 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, 3053 + ... + 4874.

It is an arithmetic number, because the mean of its divisors is an integer number (1807584).

Almost surely, 2^7221497 is an apocalyptic number.

It is an amenable number.

7221497 is a deficient number, since it is larger than the sum of its proper divisors (8839).

7221497 is an equidigital number, since it uses as much as digits as its factorization.

7221497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8838.

The product of its digits is 7056, while the sum is 32.

The square root of 7221497 is about 2687.2843169267. The cubic root of 7221497 is about 193.2898630632.

The spelling of 7221497 in words is "seven million, two hundred twenty-one thousand, four hundred ninety-seven".