204156143 has 4 divisors (see below), whose sum is σ = 211196040. Its totient is φ = 197116248.

The previous prime is 204156137. The next prime is 204156151. The reversal of 204156143 is 341651402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341651402 = 2 ⋅170825701.

It is not a de Polignac number, because 204156143 - 2⁶ = 204156079 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 (204156103) 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, 3519905 + ... + 3519962.

It is an arithmetic number, because the mean of its divisors is an integer number (52799010).

Almost surely, 2^204156143 is an apocalyptic number.

204156143 is a deficient number, since it is larger than the sum of its proper divisors (7039897).

204156143 is an equidigital number, since it uses as much as digits as its factorization.

204156143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7039896.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 204156143 is about 14288.3219098675. The cubic root of 204156143 is about 588.8266857376.

The spelling of 204156143 in words is "two hundred four million, one hundred fifty-six thousand, one hundred forty-three".