25530157 has 2 divisors, whose sum is σ = 25530158. Its totient is φ = 25530156.

The previous prime is 25530151. The next prime is 25530187. The reversal of 25530157 is 75103552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14280841 + 11249316 = 3779^2 + 3354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25530157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25530151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765078 + 12765079.

It is an arithmetic number, because the mean of its divisors is an integer number (12765079).

Almost surely, 2^25530157 is an apocalyptic number.

It is an amenable number.

25530157 is a deficient number, since it is larger than the sum of its proper divisors (1).

25530157 is an equidigital number, since it uses as much as digits as its factorization.

25530157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 25530157 is about 5052.7375748202. The cubic root of 25530157 is about 294.4542509715.

The spelling of 25530157 in words is "twenty-five million, five hundred thirty thousand, one hundred fifty-seven".