25353215 has 4 divisors (see below), whose sum is σ = 30423864. Its totient is φ = 20282568.

The previous prime is 25353191. The next prime is 25353217. The reversal of 25353215 is 51235352.

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 25353215 - 2⁶ = 25353151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25353217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2535317 + ... + 2535326.

It is an arithmetic number, because the mean of its divisors is an integer number (7605966).

Almost surely, 2^25353215 is an apocalyptic number.

25353215 is a deficient number, since it is larger than the sum of its proper divisors (5070649).

25353215 is an equidigital number, since it uses as much as digits as its factorization.

25353215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070648.

The product of its digits is 4500, while the sum is 26.

The square root of 25353215 is about 5035.1976128053. The cubic root of 25353215 is about 293.7724147676.

Adding to 25353215 its reverse (51235352), we get a palindrome (76588567).

The spelling of 25353215 in words is "twenty-five million, three hundred fifty-three thousand, two hundred fifteen".