7225515 has 36 divisors (see below), whose sum is σ = 13776672. Its totient is φ = 3500640.

The previous prime is 7225513. The next prime is 7225531. The reversal of 7225515 is 5155227.

It is a happy number.

It is not a de Polignac number, because 7225515 - 2¹ = 7225513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7225513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4782 + ... + 6108.

Almost surely, 2^7225515 is an apocalyptic number.

7225515 is a deficient number, since it is larger than the sum of its proper divisors (6551157).

7225515 is a wasteful number, since it uses less digits than its factorization.

7225515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 1346 counting only the distinct ones).

The product of its digits is 3500, while the sum is 27.

The square root of 7225515 is about 2688.0318078475. The cubic root of 7225515 is about 193.3257048780.

It can be divided in two parts, 7 and 225515, that added together give a palindrome (225522).

The spelling of 7225515 in words is "seven million, two hundred twenty-five thousand, five hundred fifteen".