211145243 has 2 divisors, whose sum is σ = 211145244. Its totient is φ = 211145242.

The previous prime is 211145239. The next prime is 211145251. The reversal of 211145243 is 342541112.

211145243 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 211145243 - 2² = 211145239 is a prime.

It is not a weakly prime, because it can be changed into another prime (211145293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105572621 + 105572622.

It is an arithmetic number, because the mean of its divisors is an integer number (105572622).

Almost surely, 2^211145243 is an apocalyptic number.

211145243 is a deficient number, since it is larger than the sum of its proper divisors (1).

211145243 is an equidigital number, since it uses as much as digits as its factorization.

211145243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 211145243 is about 14530.8376565152. The cubic root of 211145243 is about 595.4707504921.

Adding to 211145243 its reverse (342541112), we get a palindrome (553686355).

The spelling of 211145243 in words is "two hundred eleven million, one hundred forty-five thousand, two hundred forty-three".