25992251 has 2 divisors, whose sum is σ = 25992252. Its totient is φ = 25992250.

The previous prime is 25992233. The next prime is 25992257. The reversal of 25992251 is 15229952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25992251 - 2¹⁰ = 25991227 is a prime.

It is a super-2 number, since 2×25992251² = 1351194224094002, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25992257) 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, 12996125 + 12996126.

It is an arithmetic number, because the mean of its divisors is an integer number (12996126).

Almost surely, 2^25992251 is an apocalyptic number.

25992251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25992251 is an equidigital number, since it uses as much as digits as its factorization.

25992251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 35.

The square root of 25992251 is about 5098.2596050025. The cubic root of 25992251 is about 296.2201726574.

The spelling of 25992251 in words is "twenty-five million, nine hundred ninety-two thousand, two hundred fifty-one".