255143243 has 4 divisors (see below), whose sum is σ = 255199560. Its totient is φ = 255086928.

The previous prime is 255143221. The next prime is 255143269. The reversal of 255143243 is 342341552.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255143243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255143143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20705 + ... + 30642.

It is an arithmetic number, because the mean of its divisors is an integer number (63799890).

Almost surely, 2^255143243 is an apocalyptic number.

255143243 is a deficient number, since it is larger than the sum of its proper divisors (56317).

255143243 is an equidigital number, since it uses as much as digits as its factorization.

255143243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56316.

The product of its digits is 14400, while the sum is 29.

The square root of 255143243 is about 15973.2039052909. The cubic root of 255143243 is about 634.2512869419.

Adding to 255143243 its reverse (342341552), we get a palindrome (597484795).

The spelling of 255143243 in words is "two hundred fifty-five million, one hundred forty-three thousand, two hundred forty-three".