25215227 has 4 divisors (see below), whose sum is σ = 25691040. Its totient is φ = 24739416.

The previous prime is 25215221. The next prime is 25215251. The reversal of 25215227 is 72251252.

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 25215227 - 2⁸ = 25214971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25215196 and 25215205.

It is not an unprimeable number, because it can be changed into a prime (25215221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 237827 + ... + 237932.

It is an arithmetic number, because the mean of its divisors is an integer number (6422760).

Almost surely, 2^25215227 is an apocalyptic number.

25215227 is a deficient number, since it is larger than the sum of its proper divisors (475813).

25215227 is an equidigital number, since it uses as much as digits as its factorization.

25215227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475812.

The product of its digits is 2800, while the sum is 26.

The square root of 25215227 is about 5021.4765756698. The cubic root of 25215227 is about 293.2384807240.

Adding to 25215227 its reverse (72251252), we get a palindrome (97466479).

The spelling of 25215227 in words is "twenty-five million, two hundred fifteen thousand, two hundred twenty-seven".