211449577013 has 2 divisors, whose sum is σ = 211449577014. Its totient is φ = 211449577012.

The previous prime is 211449576913. The next prime is 211449577019. The reversal of 211449577013 is 310775944112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186000713284 + 25448863729 = 431278^2 + 159527^2 .

It is a cyclic number.

It is not a de Polignac number, because 211449577013 - 2¹⁶ = 211449511477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211449577019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105724788506 + 105724788507.

It is an arithmetic number, because the mean of its divisors is an integer number (105724788507).

Almost surely, 2^211449577013 is an apocalyptic number.

It is an amenable number.

211449577013 is a deficient number, since it is larger than the sum of its proper divisors (1).

211449577013 is an equidigital number, since it uses as much as digits as its factorization.

211449577013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 211449577013 in words is "two hundred eleven billion, four hundred forty-nine million, five hundred seventy-seven thousand, thirteen".