204536261 has 2 divisors, whose sum is σ = 204536262. Its totient is φ = 204536260.

The previous prime is 204536243. The next prime is 204536279. The reversal of 204536261 is 162635402.

204536261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (204536243) and next prime (204536279).

It can be written as a sum of positive squares in only one way, i.e., 125664100 + 78872161 = 11210^2 + 8881^2 .

It is a cyclic number.

It is not a de Polignac number, because 204536261 - 2¹⁸ = 204274117 is a prime.

It is equal to p_11316179 and since 204536261 and 11316179 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204536221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102268130 + 102268131.

It is an arithmetic number, because the mean of its divisors is an integer number (102268131).

Almost surely, 2^204536261 is an apocalyptic number.

It is an amenable number.

204536261 is a deficient number, since it is larger than the sum of its proper divisors (1).

204536261 is an equidigital number, since it uses as much as digits as its factorization.

204536261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 204536261 is about 14301.6174260116. The cubic root of 204536261 is about 589.1919043232.

The spelling of 204536261 in words is "two hundred four million, five hundred thirty-six thousand, two hundred sixty-one".