25500043 has 2 divisors, whose sum is σ = 25500044. Its totient is φ = 25500042.

The previous prime is 25500023. The next prime is 25500047. The reversal of 25500043 is 34000552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25500043 - 2⁹ = 25499531 is a prime.

It is not a weakly prime, because it can be changed into another prime (25500047) 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, 12750021 + 12750022.

It is an arithmetic number, because the mean of its divisors is an integer number (12750022).

Almost surely, 2^25500043 is an apocalyptic number.

25500043 is a deficient number, since it is larger than the sum of its proper divisors (1).

25500043 is an equidigital number, since it uses as much as digits as its factorization.

25500043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 25500043 is about 5049.7567268137. The cubic root of 25500043 is about 294.3384312891.

Adding to 25500043 its reverse (34000552), we get a palindrome (59500595).

The spelling of 25500043 in words is "twenty-five million, five hundred thousand, forty-three".