211434140471 has 2 divisors, whose sum is σ = 211434140472. Its totient is φ = 211434140470.

The previous prime is 211434140329. The next prime is 211434140509. The reversal of 211434140471 is 174041434112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211434140471 is a prime.

It is a super-3 number, since 3×211434140471³ (a number of 35 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211434110471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105717070235 + 105717070236.

It is an arithmetic number, because the mean of its divisors is an integer number (105717070236).

Almost surely, 2^211434140471 is an apocalyptic number.

211434140471 is a deficient number, since it is larger than the sum of its proper divisors (1).

211434140471 is an equidigital number, since it uses as much as digits as its factorization.

211434140471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

Adding to 211434140471 its reverse (174041434112), we get a palindrome (385475574583).

It can be divided in two parts, 21143 and 4140471, that added together give a palindrome (4161614).

The spelling of 211434140471 in words is "two hundred eleven billion, four hundred thirty-four million, one hundred forty thousand, four hundred seventy-one".