25518043 has 2 divisors, whose sum is σ = 25518044. Its totient is φ = 25518042.

The previous prime is 25518041. The next prime is 25518067. The reversal of 25518043 is 34081552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25518043 - 2¹ = 25518041 is a prime.

Together with 25518041, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25518041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12759021 + 12759022.

It is an arithmetic number, because the mean of its divisors is an integer number (12759022).

Almost surely, 2^25518043 is an apocalyptic number.

25518043 is a deficient number, since it is larger than the sum of its proper divisors (1).

25518043 is an equidigital number, since it uses as much as digits as its factorization.

25518043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 25518043 is about 5051.5386764826. The cubic root of 25518043 is about 294.4076709847.

Adding to 25518043 its reverse (34081552), we get a palindrome (59599595).

The spelling of 25518043 in words is "twenty-five million, five hundred eighteen thousand, forty-three".