7715225 has 12 divisors (see below), whose sum is σ = 10933824. Its totient is φ = 5290320.

The previous prime is 7715179. The next prime is 7715261. The reversal of 7715225 is 5225177.

It is not a de Polignac number, because 7715225 - 2¹⁶ = 7649689 is a prime.

It is a super-4 number, since 4×7715225⁴ (a number of 29 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21869 + ... + 22218.

It is an arithmetic number, because the mean of its divisors is an integer number (911152).

Almost surely, 2^7715225 is an apocalyptic number.

It is an amenable number.

7715225 is a deficient number, since it is larger than the sum of its proper divisors (3218599).

7715225 is a wasteful number, since it uses less digits than its factorization.

7715225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44104 (or 44099 counting only the distinct ones).

The product of its digits is 4900, while the sum is 29.

The square root of 7715225 is about 2777.6293849252. The cubic root of 7715225 is about 197.5981459529.

It can be divided in two parts, 77152 and 25, that added together give a palindrome (77177).

The spelling of 7715225 in words is "seven million, seven hundred fifteen thousand, two hundred twenty-five".