25305015 has 16 divisors (see below), whose sum is σ = 40550400. Its totient is φ = 13475232.

The previous prime is 25305013. The next prime is 25305053. The reversal of 25305015 is 51050352.

It is not a de Polignac number, because 25305015 - 2¹ = 25305013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25304982 and 25305000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25305013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18526 + ... + 19844.

It is an arithmetic number, because the mean of its divisors is an integer number (2534400).

Almost surely, 2^25305015 is an apocalyptic number.

25305015 is a deficient number, since it is larger than the sum of its proper divisors (15245385).

25305015 is a wasteful number, since it uses less digits than its factorization.

25305015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 25305015 is about 5030.4090290950. The cubic root of 25305015 is about 293.5861292130.

Adding to 25305015 its reverse (51050352), we get a palindrome (76355367).

The spelling of 25305015 in words is "twenty-five million, three hundred five thousand, fifteen".