25351217 has 4 divisors (see below), whose sum is σ = 25386816. Its totient is φ = 25315620.

The previous prime is 25351213. The next prime is 25351219. The reversal of 25351217 is 71215352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25351217 - 2² = 25351213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25351213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16709 + ... + 18162.

It is an arithmetic number, because the mean of its divisors is an integer number (6346704).

Almost surely, 2^25351217 is an apocalyptic number.

It is an amenable number.

25351217 is a deficient number, since it is larger than the sum of its proper divisors (35599).

25351217 is an equidigital number, since it uses as much as digits as its factorization.

25351217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35598.

The product of its digits is 2100, while the sum is 26.

The square root of 25351217 is about 5034.9992055610. Note that the first 3 decimals coincide. The cubic root of 25351217 is about 293.7646974991.

Adding to 25351217 its reverse (71215352), we get a palindrome (96566569).

The spelling of 25351217 in words is "twenty-five million, three hundred fifty-one thousand, two hundred seventeen".