25253915 has 4 divisors (see below), whose sum is σ = 30304704. Its totient is φ = 20203128.

The previous prime is 25253911. The next prime is 25253923. The reversal of 25253915 is 51935252.

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 25253915 - 2² = 25253911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25253911) 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, 2525387 + ... + 2525396.

It is an arithmetic number, because the mean of its divisors is an integer number (7576176).

Almost surely, 2^25253915 is an apocalyptic number.

25253915 is a deficient number, since it is larger than the sum of its proper divisors (5050789).

25253915 is an equidigital number, since it uses as much as digits as its factorization.

25253915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050788.

The product of its digits is 13500, while the sum is 32.

The square root of 25253915 is about 5025.3273525214. The cubic root of 25253915 is about 293.3883770958.

The spelling of 25253915 in words is "twenty-five million, two hundred fifty-three thousand, nine hundred fifteen".