211240133 has 8 divisors (see below), whose sum is σ = 231219576. Its totient is φ = 191793600.

The previous prime is 211240121. The next prime is 211240151. The reversal of 211240133 is 331042112.

It can be written as a sum of positive squares in 4 ways, for example, as 10252804 + 200987329 = 3202^2 + 14177^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211240133 - 2¹² = 211236037 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 (211240153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132398 + ... + 133983.

It is an arithmetic number, because the mean of its divisors is an integer number (28902447).

Almost surely, 2^211240133 is an apocalyptic number.

It is an amenable number.

211240133 is a deficient number, since it is larger than the sum of its proper divisors (19979443).

211240133 is a wasteful number, since it uses less digits than its factorization.

211240133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266455.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 211240133 is about 14534.1024146660. The cubic root of 211240133 is about 595.5599398993.

Adding to 211240133 its reverse (331042112), we get a palindrome (542282245).

The spelling of 211240133 in words is "two hundred eleven million, two hundred forty thousand, one hundred thirty-three".