25315717 has 4 divisors (see below), whose sum is σ = 28932256. Its totient is φ = 21699180.

The previous prime is 25315699. The next prime is 25315727. The reversal of 25315717 is 71751352.

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 a cyclic number.

It is not a de Polignac number, because 25315717 - 2¹¹ = 25313669 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 (25315727) 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, 1808259 + ... + 1808272.

It is an arithmetic number, because the mean of its divisors is an integer number (7233064).

Almost surely, 2^25315717 is an apocalyptic number.

It is an amenable number.

25315717 is a deficient number, since it is larger than the sum of its proper divisors (3616539).

25315717 is an equidigital number, since it uses as much as digits as its factorization.

25315717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616538.

The product of its digits is 7350, while the sum is 31.

The square root of 25315717 is about 5031.4726472475. The cubic root of 25315717 is about 293.6275112069.

The spelling of 25315717 in words is "twenty-five million, three hundred fifteen thousand, seven hundred seventeen".