25313505 has 24 divisors (see below), whose sum is σ = 46382016. Its totient is φ = 11548320.

The previous prime is 25313503. The next prime is 25313521. The reversal of 25313505 is 50531352.

It is not a de Polignac number, because 25313505 - 2¹ = 25313503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25313503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51310 + ... + 51800.

It is an arithmetic number, because the mean of its divisors is an integer number (1932584).

Almost surely, 2^25313505 is an apocalyptic number.

It is an amenable number.

25313505 is a deficient number, since it is larger than the sum of its proper divisors (21068511).

25313505 is an frugal number, since it uses more digits than its factorization.

25313505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 25313505 is about 5031.2528260862. The cubic root of 25313505 is about 293.6189589049.

Adding to 25313505 its reverse (50531352), we get a palindrome (75844857).

The spelling of 25313505 in words is "twenty-five million, three hundred thirteen thousand, five hundred five".