205143534 has 12 divisors (see below), whose sum is σ = 444477696. Its totient is φ = 68381172.

The previous prime is 205143529. The next prime is 205143553. The reversal of 205143534 is 435341502.

It is a junction number, because it is equal to n+sod(n) for n = 205143498 and 205143507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5698414 + ... + 5698449.

It is an arithmetic number, because the mean of its divisors is an integer number (37039808).

Almost surely, 2^205143534 is an apocalyptic number.

205143534 is an abundant number, since it is smaller than the sum of its proper divisors (239334162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205143534 is a wasteful number, since it uses less digits than its factorization.

205143534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11396871 (or 11396868 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 205143534 is about 14322.8326109049. The cubic root of 205143534 is about 589.7744364223.

The spelling of 205143534 in words is "two hundred five million, one hundred forty-three thousand, five hundred thirty-four".