25320205 has 8 divisors (see below), whose sum is σ = 30447000. Its totient is φ = 20214336.

The previous prime is 25320199. The next prime is 25320209. The reversal of 25320205 is 50202352.

It can be written as a sum of positive squares in 4 ways, for example, as 4553956 + 20766249 = 2134^2 + 4557^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25320205 - 2²³ = 16931597 is a prime.

It is a super-2 number, since 2×25320205² = 1282225562484050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25320209) 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 7 ways as a sum of consecutive naturals, for example, 2430 + ... + 7519.

It is an arithmetic number, because the mean of its divisors is an integer number (3805875).

Almost surely, 2^25320205 is an apocalyptic number.

It is an amenable number.

25320205 is a deficient number, since it is larger than the sum of its proper divisors (5126795).

25320205 is an equidigital number, since it uses as much as digits as its factorization.

25320205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10463.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 25320205 is about 5031.9186201687. The cubic root of 25320205 is about 293.6448617248.

Adding to 25320205 its reverse (50202352), we get a palindrome (75522557).

The spelling of 25320205 in words is "twenty-five million, three hundred twenty thousand, two hundred five".