25552999 has 2 divisors, whose sum is σ = 25553000. Its totient is φ = 25552998.

The previous prime is 25552997. The next prime is 25553027. The reversal of 25552999 is 99925552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25552999 - 2¹ = 25552997 is a prime.

Together with 25552997, 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 (25552997) 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, 12776499 + 12776500.

It is an arithmetic number, because the mean of its divisors is an integer number (12776500).

Almost surely, 2^25552999 is an apocalyptic number.

25552999 is a deficient number, since it is larger than the sum of its proper divisors (1).

25552999 is an equidigital number, since it uses as much as digits as its factorization.

25552999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 364500, while the sum is 46.

The square root of 25552999 is about 5054.9974282882. The cubic root of 25552999 is about 294.5420415151.

The spelling of 25552999 in words is "twenty-five million, five hundred fifty-two thousand, nine hundred ninety-nine".