25224149 has 2 divisors, whose sum is σ = 25224150. Its totient is φ = 25224148.

The previous prime is 25224139. The next prime is 25224151. The reversal of 25224149 is 94142252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 3972049 = 4610^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 25224149 - 2¹⁶ = 25158613 is a prime.

Together with 25224151, 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 (25224109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12612074 + 12612075.

It is an arithmetic number, because the mean of its divisors is an integer number (12612075).

Almost surely, 2^25224149 is an apocalyptic number.

It is an amenable number.

25224149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25224149 is an equidigital number, since it uses as much as digits as its factorization.

25224149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 25224149 is about 5022.3648812089. The cubic root of 25224149 is about 293.2730625425.

The spelling of 25224149 in words is "twenty-five million, two hundred twenty-four thousand, one hundred forty-nine".