255555143 has 2 divisors, whose sum is σ = 255555144. Its totient is φ = 255555142.

The previous prime is 255555119. The next prime is 255555161. The reversal of 255555143 is 341555552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255555143 - 2¹² = 255551047 is a prime.

It is a super-2 number, since 2×255555143² = 130616862227500898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (455555143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127777571 + 127777572.

It is an arithmetic number, because the mean of its divisors is an integer number (127777572).

Almost surely, 2^255555143 is an apocalyptic number.

255555143 is a deficient number, since it is larger than the sum of its proper divisors (1).

255555143 is an equidigital number, since it uses as much as digits as its factorization.

255555143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75000, while the sum is 35.

The square root of 255555143 is about 15986.0921741369. The cubic root of 255555143 is about 634.5924125031.

The spelling of 255555143 in words is "two hundred fifty-five million, five hundred fifty-five thousand, one hundred forty-three".