204011243 has 4 divisors (see below), whose sum is σ = 204321480. Its totient is φ = 203701008.

The previous prime is 204011233. The next prime is 204011281. The reversal of 204011243 is 342110402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342110402 = 2 ⋅171055201.

It is a cyclic number.

It is not a de Polignac number, because 204011243 - 2⁶ = 204011179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204011233) 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, 154130 + ... + 155447.

It is an arithmetic number, because the mean of its divisors is an integer number (51080370).

Almost surely, 2^204011243 is an apocalyptic number.

204011243 is a deficient number, since it is larger than the sum of its proper divisors (310237).

204011243 is an equidigital number, since it uses as much as digits as its factorization.

204011243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310236.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 204011243 is about 14283.2504353876. The cubic root of 204011243 is about 588.6873460162.

Adding to 204011243 its reverse (342110402), we get a palindrome (546121645).

The spelling of 204011243 in words is "two hundred four million, eleven thousand, two hundred forty-three".