205374243 has 8 divisors (see below), whose sum is σ = 274062928. Its totient is φ = 136800864.

The previous prime is 205374241. The next prime is 205374271. The reversal of 205374243 is 342473502.

205374243 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 not a de Polignac number, because 205374243 - 2¹ = 205374241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205374243.

It is not an unprimeable number, because it can be changed into a prime (205374241) 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, 24580 + ... + 31857.

It is an arithmetic number, because the mean of its divisors is an integer number (34257866).

Almost surely, 2^205374243 is an apocalyptic number.

205374243 is a deficient number, since it is larger than the sum of its proper divisors (68688685).

205374243 is a wasteful number, since it uses less digits than its factorization.

205374243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57653.

The product of its (nonzero) digits is 20160, while the sum is 30.

The square root of 205374243 is about 14330.8842365012. The cubic root of 205374243 is about 589.9954447604.

The spelling of 205374243 in words is "two hundred five million, three hundred seventy-four thousand, two hundred forty-three".