211140323 has 4 divisors (see below), whose sum is σ = 223560360. Its totient is φ = 198720288.

The previous prime is 211140233. The next prime is 211140343. The reversal of 211140323 is 323041112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211140323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 12420019 = 211140323 / (2 + 1 + 1 + 1 + 4 + 0 + 3 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211140343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6209993 + ... + 6210026.

It is an arithmetic number, because the mean of its divisors is an integer number (55890090).

Almost surely, 2^211140323 is an apocalyptic number.

211140323 is a deficient number, since it is larger than the sum of its proper divisors (12420037).

211140323 is a wasteful number, since it uses less digits than its factorization.

211140323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12420036.

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

The square root of 211140323 is about 14530.6683604024. The cubic root of 211140323 is about 595.4661253365.

Adding to 211140323 its reverse (323041112), we get a palindrome (534181435).

The spelling of 211140323 in words is "two hundred eleven million, one hundred forty thousand, three hundred twenty-three".