211023143 has 2 divisors, whose sum is σ = 211023144. Its totient is φ = 211023142.

The previous prime is 211023121. The next prime is 211023149. The reversal of 211023143 is 341320112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211023143 - 2⁶ = 211023079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211023149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105511571 + 105511572.

It is an arithmetic number, because the mean of its divisors is an integer number (105511572).

Almost surely, 2^211023143 is an apocalyptic number.

211023143 is a deficient number, since it is larger than the sum of its proper divisors (1).

211023143 is an equidigital number, since it uses as much as digits as its factorization.

211023143 is an evil number, because the sum of its binary digits is even.

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

The square root of 211023143 is about 14526.6356394039. The cubic root of 211023143 is about 595.3559464249.

Adding to 211023143 its reverse (341320112), we get a palindrome (552343255).

The spelling of 211023143 in words is "two hundred eleven million, twenty-three thousand, one hundred forty-three".