211434140623 has 2 divisors, whose sum is σ = 211434140624. Its totient is φ = 211434140622.

The previous prime is 211434140611. The next prime is 211434140663. The reversal of 211434140623 is 326041434112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211434140623 - 2⁹ = 211434140111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211434140663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105717070311 + 105717070312.

It is an arithmetic number, because the mean of its divisors is an integer number (105717070312).

Almost surely, 2^211434140623 is an apocalyptic number.

211434140623 is a deficient number, since it is larger than the sum of its proper divisors (1).

211434140623 is an equidigital number, since it uses as much as digits as its factorization.

211434140623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 211434140623 its reverse (326041434112), we get a palindrome (537475574735).

The spelling of 211434140623 in words is "two hundred eleven billion, four hundred thirty-four million, one hundred forty thousand, six hundred twenty-three".