25530287 has 2 divisors, whose sum is σ = 25530288. Its totient is φ = 25530286.

The previous prime is 25530257. The next prime is 25530293. The reversal of 25530287 is 78203552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25530287 - 2²² = 21335983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25530247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765143 + 12765144.

It is an arithmetic number, because the mean of its divisors is an integer number (12765144).

Almost surely, 2^25530287 is an apocalyptic number.

25530287 is a deficient number, since it is larger than the sum of its proper divisors (1).

25530287 is an equidigital number, since it uses as much as digits as its factorization.

25530287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 25530287 is about 5052.7504391173. The cubic root of 25530287 is about 294.4547507593.

The spelling of 25530287 in words is "twenty-five million, five hundred thirty thousand, two hundred eighty-seven".