204023111 has 2 divisors, whose sum is σ = 204023112. Its totient is φ = 204023110.

The previous prime is 204023081. The next prime is 204023117. The reversal of 204023111 is 111320402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204023111 - 2¹⁸ = 203760967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204023117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102011555 + 102011556.

It is an arithmetic number, because the mean of its divisors is an integer number (102011556).

Almost surely, 2^204023111 is an apocalyptic number.

204023111 is a deficient number, since it is larger than the sum of its proper divisors (1).

204023111 is an equidigital number, since it uses as much as digits as its factorization.

204023111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 204023111 is about 14283.6658809985. The cubic root of 204023111 is about 588.6987610831.

Adding to 204023111 its reverse (111320402), we get a palindrome (315343513).

The spelling of 204023111 in words is "two hundred four million, twenty-three thousand, one hundred eleven".