205248943 has 4 divisors (see below), whose sum is σ = 205278808. Its totient is φ = 205219080.

The previous prime is 205248931. The next prime is 205248947. The reversal of 205248943 is 349842502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 205248943 - 2²¹ = 203151791 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 (205248947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153 + ... + 20293.

It is an arithmetic number, because the mean of its divisors is an integer number (51319702).

Almost surely, 2^205248943 is an apocalyptic number.

205248943 is a deficient number, since it is larger than the sum of its proper divisors (29865).

205248943 is a wasteful number, since it uses less digits than its factorization.

205248943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29864.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 205248943 is about 14326.5118922926. The cubic root of 205248943 is about 589.8754338191.

The spelling of 205248943 in words is "two hundred five million, two hundred forty-eight thousand, nine hundred forty-three".