25198211 has 2 divisors, whose sum is σ = 25198212. Its totient is φ = 25198210.

The previous prime is 25198193. The next prime is 25198223. The reversal of 25198211 is 11289152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25198211 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25198291) 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, 12599105 + 12599106.

It is an arithmetic number, because the mean of its divisors is an integer number (12599106).

Almost surely, 2^25198211 is an apocalyptic number.

25198211 is a deficient number, since it is larger than the sum of its proper divisors (1).

25198211 is an equidigital number, since it uses as much as digits as its factorization.

25198211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 29.

The square root of 25198211 is about 5019.7819673767. The cubic root of 25198211 is about 293.1725038069.

The spelling of 25198211 in words is "twenty-five million, one hundred ninety-eight thousand, two hundred eleven".