25355217 has 4 divisors (see below), whose sum is σ = 33806960. Its totient is φ = 16903476.

The previous prime is 25355207. The next prime is 25355227. The reversal of 25355217 is 71255352.

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 an interprime number because it is at equal distance from previous prime (25355207) and next prime (25355227).

It is not a de Polignac number, because 25355217 - 2⁶ = 25355153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25355207) 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, 4225867 + ... + 4225872.

It is an arithmetic number, because the mean of its divisors is an integer number (8451740).

Almost surely, 2^25355217 is an apocalyptic number.

It is an amenable number.

25355217 is a deficient number, since it is larger than the sum of its proper divisors (8451743).

25355217 is an equidigital number, since it uses as much as digits as its factorization.

25355217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8451742.

The product of its digits is 10500, while the sum is 30.

The square root of 25355217 is about 5035.3964094200. The cubic root of 25355217 is about 293.7801470795.

The spelling of 25355217 in words is "twenty-five million, three hundred fifty-five thousand, two hundred seventeen".