204154243 has 2 divisors, whose sum is σ = 204154244. Its totient is φ = 204154242.

The previous prime is 204154193. The next prime is 204154273. The reversal of 204154243 is 342451402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204154243 - 2²¹ = 202057091 is a prime.

It is not a weakly prime, because it can be changed into another prime (204154273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102077121 + 102077122.

It is an arithmetic number, because the mean of its divisors is an integer number (102077122).

Almost surely, 2^204154243 is an apocalyptic number.

204154243 is a deficient number, since it is larger than the sum of its proper divisors (1).

204154243 is an equidigital number, since it uses as much as digits as its factorization.

204154243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 204154243 is about 14288.2554218491. The cubic root of 204154243 is about 588.8248590734.

The spelling of 204154243 in words is "two hundred four million, one hundred fifty-four thousand, two hundred forty-three".