25958551 has 2 divisors, whose sum is σ = 25958552. Its totient is φ = 25958550.

The previous prime is 25958549. The next prime is 25958573. The reversal of 25958551 is 15585952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25958551 - 2¹ = 25958549 is a prime.

Together with 25958549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25958951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12979275 + 12979276.

It is an arithmetic number, because the mean of its divisors is an integer number (12979276).

Almost surely, 2^25958551 is an apocalyptic number.

25958551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25958551 is an equidigital number, since it uses as much as digits as its factorization.

25958551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90000, while the sum is 40.

The square root of 25958551 is about 5094.9534835953. The cubic root of 25958551 is about 296.0920968292.

The spelling of 25958551 in words is "twenty-five million, nine hundred fifty-eight thousand, five hundred fifty-one".