15201225 has 36 divisors (see below), whose sum is σ = 29327116. Its totient is φ = 7482240.

The previous prime is 15201223. The next prime is 15201233. The reversal of 15201225 is 52210251.

It can be written as a sum of positive squares in 6 ways, for example, as 1871424 + 13329801 = 1368^2 + 3651^2 .

It is not a de Polignac number, because 15201225 - 2¹ = 15201223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15201198 and 15201207.

It is not an unprimeable number, because it can be changed into a prime (15201223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 327 + ... + 5523.

Almost surely, 2^15201225 is an apocalyptic number.

15201225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15201225 is a deficient number, since it is larger than the sum of its proper divisors (14125891).

15201225 is a wasteful number, since it uses less digits than its factorization.

15201225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226 (or 5218 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 15201225 is about 3898.8748376936. The cubic root of 15201225 is about 247.7191203037.

Adding to 15201225 its reverse (52210251), we get a palindrome (67411476).

The spelling of 15201225 in words is "fifteen million, two hundred one thousand, two hundred twenty-five".