25550143 has 2 divisors, whose sum is σ = 25550144. Its totient is φ = 25550142.

The previous prime is 25550123. The next prime is 25550149. The reversal of 25550143 is 34105552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25550143 - 2⁹ = 25549631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25550149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775071 + 12775072.

It is an arithmetic number, because the mean of its divisors is an integer number (12775072).

Almost surely, 2^25550143 is an apocalyptic number.

25550143 is a deficient number, since it is larger than the sum of its proper divisors (1).

25550143 is an equidigital number, since it uses as much as digits as its factorization.

25550143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 25550143 is about 5054.7149276690. The cubic root of 25550143 is about 294.5310676771.

Adding to 25550143 its reverse (34105552), we get a palindrome (59655695).

The spelling of 25550143 in words is "twenty-five million, five hundred fifty thousand, one hundred forty-three".