205281091 has 2 divisors, whose sum is σ = 205281092. Its totient is φ = 205281090.

The previous prime is 205281079. The next prime is 205281113. The reversal of 205281091 is 190182502.

205281091 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 is a cyclic number.

It is not a de Polignac number, because 205281091 - 2²³ = 196892483 is a prime.

It is not a weakly prime, because it can be changed into another prime (205287091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102640545 + 102640546.

It is an arithmetic number, because the mean of its divisors is an integer number (102640546).

Almost surely, 2^205281091 is an apocalyptic number.

205281091 is a deficient number, since it is larger than the sum of its proper divisors (1).

205281091 is an equidigital number, since it uses as much as digits as its factorization.

205281091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 205281091 is about 14327.6338241874. The cubic root of 205281091 is about 589.9062294718.

The spelling of 205281091 in words is "two hundred five million, two hundred eighty-one thousand, ninety-one".