25151217 has 32 divisors (see below), whose sum is σ = 41583360. Its totient is φ = 13167360.

The previous prime is 25151209. The next prime is 25151221. The reversal of 25151217 is 71215152.

It is not a de Polignac number, because 25151217 - 2³ = 25151209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25151257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49159 + ... + 49667.

It is an arithmetic number, because the mean of its divisors is an integer number (1299480).

Almost surely, 2^25151217 is an apocalyptic number.

It is an amenable number.

25151217 is a deficient number, since it is larger than the sum of its proper divisors (16432143).

25151217 is a wasteful number, since it uses less digits than its factorization.

25151217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713.

The product of its digits is 700, while the sum is 24.

The square root of 25151217 is about 5015.0989023149. The cubic root of 25151217 is about 292.9901373905.

Adding to 25151217 its reverse (71215152), we get a palindrome (96366369).

The spelling of 25151217 in words is "twenty-five million, one hundred fifty-one thousand, two hundred seventeen".