25943551 has 2 divisors, whose sum is σ = 25943552. Its totient is φ = 25943550.

The previous prime is 25943527. The next prime is 25943587. The reversal of 25943551 is 15534952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25943551 - 2⁹ = 25943039 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25943591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12971775 + 12971776.

It is an arithmetic number, because the mean of its divisors is an integer number (12971776).

Almost surely, 2^25943551 is an apocalyptic number.

25943551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25943551 is an equidigital number, since it uses as much as digits as its factorization.

25943551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The square root of 25943551 is about 5093.4812260378. The cubic root of 25943551 is about 296.0350541331.

The spelling of 25943551 in words is "twenty-five million, nine hundred forty-three thousand, five hundred fifty-one".