205205043 has 8 divisors (see below), whose sum is σ = 274396608. Its totient is φ = 136408424.

The previous prime is 205205023. The next prime is 205205051. The reversal of 205205043 is 340502502.

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 205205043 - 2²⁰ = 204156467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205205023) 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, 97521 + ... + 99602.

It is an arithmetic number, because the mean of its divisors is an integer number (34299576).

Almost surely, 2^205205043 is an apocalyptic number.

205205043 is a deficient number, since it is larger than the sum of its proper divisors (69191565).

205205043 is a wasteful number, since it uses less digits than its factorization.

205205043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197473.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 205205043 is about 14324.9796858495. The cubic root of 205205043 is about 589.8333753354.

Adding to 205205043 its reverse (340502502), we get a palindrome (545707545).

The spelling of 205205043 in words is "two hundred five million, two hundred five thousand, forty-three".