25315015 has 12 divisors (see below), whose sum is σ = 33391512. Its totient is φ = 18410480.

The previous prime is 25315007. The next prime is 25315027. The reversal of 25315015 is 51051352.

It is not a de Polignac number, because 25315015 - 2³ = 25315007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20317 + ... + 21526.

It is an arithmetic number, because the mean of its divisors is an integer number (2782626).

Almost surely, 2^25315015 is an apocalyptic number.

25315015 is a deficient number, since it is larger than the sum of its proper divisors (8076497).

25315015 is a wasteful number, since it uses less digits than its factorization.

25315015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41870 (or 41859 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 25315015 is about 5031.4028858759. The cubic root of 25315015 is about 293.6247971035.

Adding to 25315015 its reverse (51051352), we get a palindrome (76366367).

The spelling of 25315015 in words is "twenty-five million, three hundred fifteen thousand, fifteen".