208264243 has 4 divisors (see below), whose sum is σ = 227197368. Its totient is φ = 189331120.

The previous prime is 208264223. The next prime is 208264261. The reversal of 208264243 is 342462802.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 208264243 - 2¹⁷ = 208133171 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208264213) 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, 9466546 + ... + 9466567.

It is an arithmetic number, because the mean of its divisors is an integer number (56799342).

Almost surely, 2^208264243 is an apocalyptic number.

208264243 is a deficient number, since it is larger than the sum of its proper divisors (18933125).

208264243 is a wasteful number, since it uses less digits than its factorization.

208264243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18933124.

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 208264243 is about 14431.3631719252. The cubic root of 208264243 is about 592.7500109843.

The spelling of 208264243 in words is "two hundred eight million, two hundred sixty-four thousand, two hundred forty-three".