25266515 has 4 divisors (see below), whose sum is σ = 30319824. Its totient is φ = 20213208.

The previous prime is 25266509. The next prime is 25266517. The reversal of 25266515 is 51566252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25266515 - 2¹⁶ = 25200979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25266517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2526647 + ... + 2526656.

It is an arithmetic number, because the mean of its divisors is an integer number (7579956).

Almost surely, 2^25266515 is an apocalyptic number.

25266515 is a deficient number, since it is larger than the sum of its proper divisors (5053309).

25266515 is an equidigital number, since it uses as much as digits as its factorization.

25266515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053308.

The product of its digits is 18000, while the sum is 32.

The square root of 25266515 is about 5026.5808458633. The cubic root of 25266515 is about 293.4371626527.

The spelling of 25266515 in words is "twenty-five million, two hundred sixty-six thousand, five hundred fifteen".