211234515523 has 2 divisors, whose sum is σ = 211234515524. Its totient is φ = 211234515522.

The previous prime is 211234515497. The next prime is 211234515581. The reversal of 211234515523 is 325515432112.

211234515523 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 211234515523 - 2¹⁷ = 211234384451 is a prime.

It is not a weakly prime, because it can be changed into another prime (211234545523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105617257761 + 105617257762.

It is an arithmetic number, because the mean of its divisors is an integer number (105617257762).

Almost surely, 2^211234515523 is an apocalyptic number.

211234515523 is a deficient number, since it is larger than the sum of its proper divisors (1).

211234515523 is an equidigital number, since it uses as much as digits as its factorization.

211234515523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 34.

Adding to 211234515523 its reverse (325515432112), we get a palindrome (536749947635).

The spelling of 211234515523 in words is "two hundred eleven billion, two hundred thirty-four million, five hundred fifteen thousand, five hundred twenty-three".