209541133 has 4 divisors (see below), whose sum is σ = 221867100. Its totient is φ = 197215168.

The previous prime is 209541127. The next prime is 209541151. The reversal of 209541133 is 331145902.

209541133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90687529 + 118853604 = 9523^2 + 10902^2 .

It is a cyclic number.

It is not a de Polignac number, because 209541133 - 2¹³ = 209532941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209541113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6162958 + ... + 6162991.

It is an arithmetic number, because the mean of its divisors is an integer number (55466775).

Almost surely, 2^209541133 is an apocalyptic number.

It is an amenable number.

209541133 is a deficient number, since it is larger than the sum of its proper divisors (12325967).

209541133 is a wasteful number, since it uses less digits than its factorization.

209541133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12325966.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 209541133 is about 14475.5356722990. The cubic root of 209541133 is about 593.9589478747.

The spelling of 209541133 in words is "two hundred nine million, five hundred forty-one thousand, one hundred thirty-three".