25315 has 8 divisors (see below), whose sum is σ = 31248. Its totient is φ = 19680.

The previous prime is 25309. The next prime is 25321. The reversal of 25315 is 51352.

It is an interprime number because it is at equal distance from previous prime (25309) and next prime (25321).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25315 - 2³ = 25307 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264 + ... + 346.

It is an arithmetic number, because the mean of its divisors is an integer number (3906).

2²⁵³¹⁵ is an apocalyptic number.

25315 is a deficient number, since it is larger than the sum of its proper divisors (5933).

25315 is an equidigital number, since it uses as much as digits as its factorization.

25315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149.

The product of its digits is 150, while the sum is 16.

The square root of 25315 is about 159.1068823150. The cubic root of 25315 is about 29.3624739109.

Adding to 25315 its reverse (51352), we get a palindrome (76667).

It can be divided in two parts, 25 and 315, that multiplied together give a triangular number (7875 = T₁₂₅).

The spelling of 25315 in words is "twenty-five thousand, three hundred fifteen".