25314221 has 4 divisors (see below), whose sum is σ = 25325052. Its totient is φ = 25303392.

The previous prime is 25314161. The next prime is 25314271. The reversal of 25314221 is 12241352.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 22458121 + 2856100 = 4739^2 + 1690^2 .

It is a cyclic number.

It is not a de Polignac number, because 25314221 - 2¹⁸ = 25052077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25314193 and 25314202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25314271) 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, 296 + ... + 7121.

It is an arithmetic number, because the mean of its divisors is an integer number (6331263).

Almost surely, 2^25314221 is an apocalyptic number.

It is an amenable number.

25314221 is a deficient number, since it is larger than the sum of its proper divisors (10831).

25314221 is an equidigital number, since it uses as much as digits as its factorization.

25314221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10830.

The product of its digits is 480, while the sum is 20.

The square root of 25314221 is about 5031.3239808225. The cubic root of 25314221 is about 293.6217272452.

Adding to 25314221 its reverse (12241352), we get a palindrome (37555573).

The spelling of 25314221 in words is "twenty-five million, three hundred fourteen thousand, two hundred twenty-one".