255633143 has 4 divisors (see below), whose sum is σ = 255943080. Its totient is φ = 255323208.

The previous prime is 255633139. The next prime is 255633167. The reversal of 255633143 is 341336552.

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

It is a cyclic number.

It is not a de Polignac number, because 255633143 - 2² = 255633139 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 (255633113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153728 + ... + 155381.

It is an arithmetic number, because the mean of its divisors is an integer number (63985770).

Almost surely, 2^255633143 is an apocalyptic number.

255633143 is a deficient number, since it is larger than the sum of its proper divisors (309937).

255633143 is an equidigital number, since it uses as much as digits as its factorization.

255633143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309936.

The product of its digits is 32400, while the sum is 32.

The square root of 255633143 is about 15988.5316086250. The cubic root of 255633143 is about 634.6569689201.

Adding to 255633143 its reverse (341336552), we get a palindrome (596969695).

It can be divided in two parts, 255 and 633143, that multiplied together give a triangular number (161451465 = T₁₇₉₆₉).

The spelling of 255633143 in words is "two hundred fifty-five million, six hundred thirty-three thousand, one hundred forty-three".