204942131 has 2 divisors, whose sum is σ = 204942132. Its totient is φ = 204942130.

The previous prime is 204942109. The next prime is 204942181. The reversal of 204942131 is 131249402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204942131 - 2¹⁸ = 204679987 is a prime.

It is a super-2 number, since 2×204942131² = 84002554117642322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204942131.

It is not a weakly prime, because it can be changed into another prime (204942181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102471065 + 102471066.

It is an arithmetic number, because the mean of its divisors is an integer number (102471066).

Almost surely, 2^204942131 is an apocalyptic number.

204942131 is a deficient number, since it is larger than the sum of its proper divisors (1).

204942131 is an equidigital number, since it uses as much as digits as its factorization.

204942131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 204942131 is about 14315.8000475000. The cubic root of 204942131 is about 589.5813663445.

The spelling of 204942131 in words is "two hundred four million, nine hundred forty-two thousand, one hundred thirty-one".