211440023 has 2 divisors, whose sum is σ = 211440024. Its totient is φ = 211440022.

The previous prime is 211439983. The next prime is 211440029. The reversal of 211440023 is 320044112.

211440023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211440023 - 2¹² = 211435927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211439983 and 211440010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211440029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105720011 + 105720012.

It is an arithmetic number, because the mean of its divisors is an integer number (105720012).

Almost surely, 2^211440023 is an apocalyptic number.

211440023 is a deficient number, since it is larger than the sum of its proper divisors (1).

211440023 is an equidigital number, since it uses as much as digits as its factorization.

211440023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 211440023 is about 14540.9773743033. The cubic root of 211440023 is about 595.7477339901.

Adding to 211440023 its reverse (320044112), we get a palindrome (531484135).

The spelling of 211440023 in words is "two hundred eleven million, four hundred forty thousand, twenty-three".