25005515 has 8 divisors (see below), whose sum is σ = 30073680. Its totient is φ = 19959712.

The previous prime is 25005509. The next prime is 25005517. The reversal of 25005515 is 51550052.

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

It is a cyclic number.

It is not a de Polignac number, because 25005515 - 2¹⁶ = 24939979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25005517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3020 + ... + 7689.

It is an arithmetic number, because the mean of its divisors is an integer number (3759210).

Almost surely, 2^25005515 is an apocalyptic number.

25005515 is a deficient number, since it is larger than the sum of its proper divisors (5068165).

25005515 is a wasteful number, since it uses less digits than its factorization.

25005515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11181.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 25005515 is about 5000.5514695881. The cubic root of 25005515 is about 292.4232735175.

Adding to 25005515 its reverse (51550052), we get a palindrome (76555567).

The spelling of 25005515 in words is "twenty-five million, five thousand, five hundred fifteen".