205740143 has 8 divisors (see below), whose sum is σ = 237774240. Its totient is φ = 174366720.

The previous prime is 205740133. The next prime is 205740169. The reversal of 205740143 is 341047502.

205740143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205740143 - 2¹⁰ = 205739119 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 (205740133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164498 + ... + 165743.

It is an arithmetic number, because the mean of its divisors is an integer number (29721780).

Almost surely, 2^205740143 is an apocalyptic number.

205740143 is a deficient number, since it is larger than the sum of its proper divisors (32034097).

205740143 is an equidigital number, since it uses as much as digits as its factorization.

205740143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330337.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 205740143 is about 14343.6446902452. The cubic root of 205740143 is about 590.3456205362.

Adding to 205740143 its reverse (341047502), we get a palindrome (546787645).

The spelling of 205740143 in words is "two hundred five million, seven hundred forty thousand, one hundred forty-three".