255440143 has 4 divisors (see below), whose sum is σ = 291931600. Its totient is φ = 218948688.

The previous prime is 255440131. The next prime is 255440173. The reversal of 255440143 is 341044552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 255440143 - 2¹⁷ = 255309071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255440173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18245718 + ... + 18245731.

It is an arithmetic number, because the mean of its divisors is an integer number (72982900).

Almost surely, 2^255440143 is an apocalyptic number.

255440143 is a deficient number, since it is larger than the sum of its proper divisors (36491457).

255440143 is an equidigital number, since it uses as much as digits as its factorization.

255440143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36491456.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 255440143 is about 15982.4948928507. The cubic root of 255440143 is about 634.4972092056.

Adding to 255440143 its reverse (341044552), we get a palindrome (596484695).

The spelling of 255440143 in words is "two hundred fifty-five million, four hundred forty thousand, one hundred forty-three".