25213211 has 2 divisors, whose sum is σ = 25213212. Its totient is φ = 25213210.

The previous prime is 25213207. The next prime is 25213217. The reversal of 25213211 is 11231252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25213211 - 2² = 25213207 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25213211.

It is not a weakly prime, because it can be changed into another prime (25213217) 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 as a sum of consecutive naturals, namely, 12606605 + 12606606.

It is an arithmetic number, because the mean of its divisors is an integer number (12606606).

Almost surely, 2^25213211 is an apocalyptic number.

25213211 is a deficient number, since it is larger than the sum of its proper divisors (1).

25213211 is an equidigital number, since it uses as much as digits as its factorization.

25213211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 17.

The square root of 25213211 is about 5021.2758338892. The cubic root of 25213211 is about 293.2306655451.

Adding to 25213211 its reverse (11231252), we get a palindrome (36444463).

The spelling of 25213211 in words is "twenty-five million, two hundred thirteen thousand, two hundred eleven".