25487563 has 2 divisors, whose sum is σ = 25487564. Its totient is φ = 25487562.

The previous prime is 25487521. The next prime is 25487591. The reversal of 25487563 is 36578452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25487563 is a prime.

It is not a weakly prime, because it can be changed into another prime (25482563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12743781 + 12743782.

It is an arithmetic number, because the mean of its divisors is an integer number (12743782).

Almost surely, 2^25487563 is an apocalyptic number.

25487563 is a deficient number, since it is larger than the sum of its proper divisors (1).

25487563 is an equidigital number, since it uses as much as digits as its factorization.

25487563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 40.

The square root of 25487563 is about 5048.5208724932. The cubic root of 25487563 is about 294.2904059708.

The spelling of 25487563 in words is "twenty-five million, four hundred eighty-seven thousand, five hundred sixty-three".