25616315 has 4 divisors (see below), whose sum is σ = 30739584. Its totient is φ = 20493048.

The previous prime is 25616291. The next prime is 25616329. The reversal of 25616315 is 51361652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25616315 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2561627 + ... + 2561636.

It is an arithmetic number, because the mean of its divisors is an integer number (7684896).

Almost surely, 2^25616315 is an apocalyptic number.

25616315 is a deficient number, since it is larger than the sum of its proper divisors (5123269).

25616315 is an equidigital number, since it uses as much as digits as its factorization.

25616315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123268.

The product of its digits is 5400, while the sum is 29.

The square root of 25616315 is about 5061.2562669756. The cubic root of 25616315 is about 294.7851159433.

Adding to 25616315 its reverse (51361652), we get a palindrome (76977967).

The spelling of 25616315 in words is "twenty-five million, six hundred sixteen thousand, three hundred fifteen".