205921253 has 2 divisors, whose sum is σ = 205921254. Its totient is φ = 205921252.

The previous prime is 205921237. The next prime is 205921301. The reversal of 205921253 is 352129502.

205921253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176836804 + 29084449 = 13298^2 + 5393^2 .

It is a cyclic number.

It is not a de Polignac number, because 205921253 - 2⁴ = 205921237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205921213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102960626 + 102960627.

It is an arithmetic number, because the mean of its divisors is an integer number (102960627).

Almost surely, 2^205921253 is an apocalyptic number.

It is an amenable number.

205921253 is a deficient number, since it is larger than the sum of its proper divisors (1).

205921253 is an equidigital number, since it uses as much as digits as its factorization.

205921253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 205921253 is about 14349.9565504569. The cubic root of 205921253 is about 590.5187939002.

The spelling of 205921253 in words is "two hundred five million, nine hundred twenty-one thousand, two hundred fifty-three".