25221189 has 16 divisors (see below), whose sum is σ = 40455680. Its totient is φ = 13653360.

The previous prime is 25221181. The next prime is 25221199. The reversal of 25221189 is 98112252.

It is not a de Polignac number, because 25221189 - 2³ = 25221181 is a prime.

It is a super-2 number, since 2×25221189² = 1272216749147442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25221181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31207 + ... + 32004.

It is an arithmetic number, because the mean of its divisors is an integer number (2528480).

Almost surely, 2^25221189 is an apocalyptic number.

It is an amenable number.

25221189 is a deficient number, since it is larger than the sum of its proper divisors (15234491).

25221189 is a wasteful number, since it uses less digits than its factorization.

25221189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63240.

The product of its digits is 2880, while the sum is 30.

The square root of 25221189 is about 5022.0701906684. The cubic root of 25221189 is about 293.2615904379.

The spelling of 25221189 in words is "twenty-five million, two hundred twenty-one thousand, one hundred eighty-nine".