285315143 has 2 divisors, whose sum is σ = 285315144. Its totient is φ = 285315142.

The previous prime is 285315139. The next prime is 285315157. The reversal of 285315143 is 341513582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285315143 - 2² = 285315139 is a prime.

It is a super-2 number, since 2×285315143² = 162809461650220898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285315113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142657571 + 142657572.

It is an arithmetic number, because the mean of its divisors is an integer number (142657572).

Almost surely, 2^285315143 is an apocalyptic number.

285315143 is a deficient number, since it is larger than the sum of its proper divisors (1).

285315143 is an equidigital number, since it uses as much as digits as its factorization.

285315143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The square root of 285315143 is about 16891.2741674511. The cubic root of 285315143 is about 658.3269093998.

The spelling of 285315143 in words is "two hundred eighty-five million, three hundred fifteen thousand, one hundred forty-three".