204156523 has 2 divisors, whose sum is σ = 204156524. Its totient is φ = 204156522.

The previous prime is 204156521. The next prime is 204156527. The reversal of 204156523 is 325651402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204156523 - 2¹ = 204156521 is a prime.

Together with 204156521, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 204156491 and 204156500.

It is not a weakly prime, because it can be changed into another prime (204156521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102078261 + 102078262.

It is an arithmetic number, because the mean of its divisors is an integer number (102078262).

Almost surely, 2^204156523 is an apocalyptic number.

204156523 is a deficient number, since it is larger than the sum of its proper divisors (1).

204156523 is an equidigital number, since it uses as much as digits as its factorization.

204156523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 204156523 is about 14288.3352074341. The cubic root of 204156523 is about 588.8270510691.

It can be divided in two parts, 2041 and 56523, that added together give a square (58564 = 242²).

The spelling of 204156523 in words is "two hundred four million, one hundred fifty-six thousand, five hundred twenty-three".