25528819 has 2 divisors, whose sum is σ = 25528820. Its totient is φ = 25528818.

The previous prime is 25528813. The next prime is 25528829. The reversal of 25528819 is 91882552.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25528819 is a prime.

It is a super-3 number, since 3×25528819³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25528813) 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, 12764409 + 12764410.

It is an arithmetic number, because the mean of its divisors is an integer number (12764410).

Almost surely, 2^25528819 is an apocalyptic number.

25528819 is a deficient number, since it is larger than the sum of its proper divisors (1).

25528819 is an equidigital number, since it uses as much as digits as its factorization.

25528819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 40.

The square root of 25528819 is about 5052.6051696130. The cubic root of 25528819 is about 294.4491069024.

The spelling of 25528819 in words is "twenty-five million, five hundred twenty-eight thousand, eight hundred nineteen".