15272225 has 12 divisors (see below), whose sum is σ = 19019244. Its totient is φ = 12165120.

The previous prime is 15272221. The next prime is 15272233. The reversal of 15272225 is 52227251.

It can be written as a sum of positive squares in 6 ways, for example, as 279841 + 14992384 = 529^2 + 3872^2 .

It is not a de Polignac number, because 15272225 - 2² = 15272221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15272194 and 15272203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15272221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5237 + ... + 7613.

It is an arithmetic number, because the mean of its divisors is an integer number (1584937).

Almost surely, 2^15272225 is an apocalyptic number.

It is an amenable number.

15272225 is a deficient number, since it is larger than the sum of its proper divisors (3747019).

15272225 is a wasteful number, since it uses less digits than its factorization.

15272225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644 (or 2639 counting only the distinct ones).

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

The square root of 15272225 is about 3907.9694215794. The cubic root of 15272225 is about 248.1041933414.

Adding to 15272225 its reverse (52227251), we get a palindrome (67499476).

The spelling of 15272225 in words is "fifteen million, two hundred seventy-two thousand, two hundred twenty-five".