25651315 has 4 divisors (see below), whose sum is σ = 30781584. Its totient is φ = 20521048.

The previous prime is 25651277. The next prime is 25651319. The reversal of 25651315 is 51315652.

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

It is a cyclic number.

It is not a de Polignac number, because 25651315 - 2⁹ = 25650803 is a prime.

It is a super-2 number, since 2×25651315² = 1315979922458450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25651319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2565127 + ... + 2565136.

It is an arithmetic number, because the mean of its divisors is an integer number (7695396).

Almost surely, 2^25651315 is an apocalyptic number.

25651315 is a deficient number, since it is larger than the sum of its proper divisors (5130269).

25651315 is an equidigital number, since it uses as much as digits as its factorization.

25651315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5130268.

The product of its digits is 4500, while the sum is 28.

The square root of 25651315 is about 5064.7127263054. The cubic root of 25651315 is about 294.9193114569.

Adding to 25651315 its reverse (51315652), we get a palindrome (76966967).

The spelling of 25651315 in words is "twenty-five million, six hundred fifty-one thousand, three hundred fifteen".