25551587 has 2 divisors, whose sum is σ = 25551588. Its totient is φ = 25551586.

The previous prime is 25551583. The next prime is 25551607. The reversal of 25551587 is 78515552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25551587 - 2² = 25551583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25551587.

It is not a weakly prime, because it can be changed into another prime (25551583) 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, 12775793 + 12775794.

It is an arithmetic number, because the mean of its divisors is an integer number (12775794).

Almost surely, 2^25551587 is an apocalyptic number.

25551587 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551587 is an equidigital number, since it uses as much as digits as its factorization.

25551587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70000, while the sum is 38.

The square root of 25551587 is about 5054.8577625884. The cubic root of 25551587 is about 294.5366161764.

The spelling of 25551587 in words is "twenty-five million, five hundred fifty-one thousand, five hundred eighty-seven".