205157143 has 2 divisors, whose sum is σ = 205157144. Its totient is φ = 205157142.

The previous prime is 205157129. The next prime is 205157177. The reversal of 205157143 is 341751502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205157143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205157123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102578571 + 102578572.

It is an arithmetic number, because the mean of its divisors is an integer number (102578572).

Almost surely, 2^205157143 is an apocalyptic number.

205157143 is a deficient number, since it is larger than the sum of its proper divisors (1).

205157143 is an equidigital number, since it uses as much as digits as its factorization.

205157143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 205157143 is about 14323.3076836323. The cubic root of 205157143 is about 589.7874777998.

The spelling of 205157143 in words is "two hundred five million, one hundred fifty-seven thousand, one hundred forty-three".