15225145 has 32 divisors (see below), whose sum is σ = 20956320. Its totient is φ = 10536960.

The previous prime is 15225113. The next prime is 15225157. The reversal of 15225145 is 54152251.

It can be written as a sum of positive squares in 16 ways, for example, as 4959529 + 10265616 = 2227^2 + 3204^2 .

It is not a de Polignac number, because 15225145 - 2⁵ = 15225113 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 77187 + ... + 77383.

It is an arithmetic number, because the mean of its divisors is an integer number (654885).

Almost surely, 2^15225145 is an apocalyptic number.

It is an amenable number.

15225145 is a deficient number, since it is larger than the sum of its proper divisors (5731175).

15225145 is a wasteful number, since it uses less digits than its factorization.

15225145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285.

The product of its digits is 2000, while the sum is 25.

The square root of 15225145 is about 3901.9411835649. The cubic root of 15225145 is about 247.8489856284.

Adding to 15225145 its reverse (54152251), we get a palindrome (69377396).

The spelling of 15225145 in words is "fifteen million, two hundred twenty-five thousand, one hundred forty-five".