25321315 has 4 divisors (see below), whose sum is σ = 30385584. Its totient is φ = 20257048.

The previous prime is 25321277. The next prime is 25321337. The reversal of 25321315 is 51312352.

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 25321315 - 2⁷ = 25321187 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 2532127 + ... + 2532136.

It is an arithmetic number, because the mean of its divisors is an integer number (7596396).

Almost surely, 2^25321315 is an apocalyptic number.

25321315 is a deficient number, since it is larger than the sum of its proper divisors (5064269).

25321315 is an equidigital number, since it uses as much as digits as its factorization.

25321315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064268.

The product of its digits is 900, while the sum is 22.

The square root of 25321315 is about 5032.0289148613. The cubic root of 25321315 is about 293.6491526463.

Adding to 25321315 its reverse (51312352), we get a palindrome (76633667).

The spelling of 25321315 in words is "twenty-five million, three hundred twenty-one thousand, three hundred fifteen".