25119221 has 2 divisors, whose sum is σ = 25119222. Its totient is φ = 25119220.

The previous prime is 25119209. The next prime is 25119223. The reversal of 25119221 is 12291152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19018321 + 6100900 = 4361^2 + 2470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25119221 is a prime.

Together with 25119223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25119223) 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 as a sum of consecutive naturals, namely, 12559610 + 12559611.

It is an arithmetic number, because the mean of its divisors is an integer number (12559611).

Almost surely, 2^25119221 is an apocalyptic number.

It is an amenable number.

25119221 is a deficient number, since it is larger than the sum of its proper divisors (1).

25119221 is an equidigital number, since it uses as much as digits as its factorization.

25119221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 23.

The square root of 25119221 is about 5011.9079201438. The cubic root of 25119221 is about 292.8658426695.

The spelling of 25119221 in words is "twenty-five million, one hundred nineteen thousand, two hundred twenty-one".