201309205 has 12 divisors (see below), whose sum is σ = 245257740. Its totient is φ = 158625984.

The previous prime is 201309197. The next prime is 201309209. The reversal of 201309205 is 502903102.

It can be written as a sum of positive squares in 2 ways, for example, as 89245809 + 112063396 = 9447^2 + 10586^2 .

It is not a de Polignac number, because 201309205 - 2³ = 201309197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201309209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17961 + ... + 26929.

It is an arithmetic number, because the mean of its divisors is an integer number (20438145).

Almost surely, 2^201309205 is an apocalyptic number.

It is an amenable number.

201309205 is a deficient number, since it is larger than the sum of its proper divisors (43948535).

201309205 is an frugal number, since it uses more digits than its factorization.

201309205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9108 (or 9041 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 201309205 is about 14188.3475077262. The cubic root of 201309205 is about 586.0768195952.

The spelling of 201309205 in words is "two hundred one million, three hundred nine thousand, two hundred five".