25645331 has 2 divisors, whose sum is σ = 25645332. Its totient is φ = 25645330.

The previous prime is 25645303. The next prime is 25645337. The reversal of 25645331 is 13354652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25645331 - 2⁶ = 25645267 is a prime.

It is a super-2 number, since 2×25645331² = 1315366004199122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25645294 and 25645303.

It is not a weakly prime, because it can be changed into another prime (25645337) 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, 12822665 + 12822666.

It is an arithmetic number, because the mean of its divisors is an integer number (12822666).

Almost surely, 2^25645331 is an apocalyptic number.

25645331 is a deficient number, since it is larger than the sum of its proper divisors (1).

25645331 is an equidigital number, since it uses as much as digits as its factorization.

25645331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 29.

The square root of 25645331 is about 5064.1219377104. The cubic root of 25645331 is about 294.8963765130.

Adding to 25645331 its reverse (13354652), we get a palindrome (38999983).

The spelling of 25645331 in words is "twenty-five million, six hundred forty-five thousand, three hundred thirty-one".