25030221 has 4 divisors (see below), whose sum is σ = 33373632. Its totient is φ = 16686812.

The previous prime is 25030207. The next prime is 25030223. The reversal of 25030221 is 12203052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25030221 - 2²¹ = 22933069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25030221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25030223) 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, 4171701 + ... + 4171706.

It is an arithmetic number, because the mean of its divisors is an integer number (8343408).

Almost surely, 2^25030221 is an apocalyptic number.

It is an amenable number.

25030221 is a deficient number, since it is larger than the sum of its proper divisors (8343411).

25030221 is an equidigital number, since it uses as much as digits as its factorization.

25030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8343410.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 25030221 is about 5003.0211872428. The cubic root of 25030221 is about 292.5195486971.

Adding to 25030221 its reverse (12203052), we get a palindrome (37233273).

The spelling of 25030221 in words is "twenty-five million, thirty thousand, two hundred twenty-one".