25352247 has 4 divisors (see below), whose sum is σ = 33803000. Its totient is φ = 16901496.

The previous prime is 25352231. The next prime is 25352263. The reversal of 25352247 is 74225352.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25352231) and next prime (25352263).

It is not a de Polignac number, because 25352247 - 2⁴ = 25352231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25352147) 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, 4225372 + ... + 4225377.

It is an arithmetic number, because the mean of its divisors is an integer number (8450750).

Almost surely, 2^25352247 is an apocalyptic number.

25352247 is a deficient number, since it is larger than the sum of its proper divisors (8450753).

25352247 is an equidigital number, since it uses as much as digits as its factorization.

25352247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8450752.

The product of its digits is 16800, while the sum is 30.

The square root of 25352247 is about 5035.1014885502. The cubic root of 25352247 is about 293.7686759214.

Adding to 25352247 its reverse (74225352), we get a palindrome (99577599).

The spelling of 25352247 in words is "twenty-five million, three hundred fifty-two thousand, two hundred forty-seven".