7224515 has 4 divisors (see below), whose sum is σ = 8669424. Its totient is φ = 5779608.

The previous prime is 7224499. The next prime is 7224517. The reversal of 7224515 is 5154227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5154227 = 13 ⋅396479.

It is a cyclic number.

It is not a de Polignac number, because 7224515 - 2⁴ = 7224499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7224517) 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, 722447 + ... + 722456.

It is an arithmetic number, because the mean of its divisors is an integer number (2167356).

Almost surely, 2^7224515 is an apocalyptic number.

7224515 is a deficient number, since it is larger than the sum of its proper divisors (1444909).

7224515 is a wasteful number, since it uses less digits than its factorization.

7224515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444908.

The product of its digits is 2800, while the sum is 26.

The square root of 7224515 is about 2687.8457917076. The cubic root of 7224515 is about 193.3167858079.

The spelling of 7224515 in words is "seven million, two hundred twenty-four thousand, five hundred fifteen".