211430351497 has 2 divisors, whose sum is σ = 211430351498. Its totient is φ = 211430351496.

The previous prime is 211430351467. The next prime is 211430351507. The reversal of 211430351497 is 794153034112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163969114761 + 47461236736 = 404931^2 + 217856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211430351497 is a prime.

It is not a weakly prime, because it can be changed into another prime (211430351437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105715175748 + 105715175749.

It is an arithmetic number, because the mean of its divisors is an integer number (105715175749).

Almost surely, 2^211430351497 is an apocalyptic number.

It is an amenable number.

211430351497 is a deficient number, since it is larger than the sum of its proper divisors (1).

211430351497 is an equidigital number, since it uses as much as digits as its factorization.

211430351497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 211430351497 in words is "two hundred eleven billion, four hundred thirty million, three hundred fifty-one thousand, four hundred ninety-seven".