211758228413 has 2 divisors, whose sum is σ = 211758228414. Its totient is φ = 211758228412.

The previous prime is 211758228379. The next prime is 211758228533. The reversal of 211758228413 is 314822857112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210275439364 + 1482789049 = 458558^2 + 38507^2 .

It is a cyclic number.

It is not a de Polignac number, because 211758228413 - 2¹² = 211758224317 is a prime.

It is a super-2 number, since 2×211758228413² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211755228413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105879114206 + 105879114207.

It is an arithmetic number, because the mean of its divisors is an integer number (105879114207).

Almost surely, 2^211758228413 is an apocalyptic number.

It is an amenable number.

211758228413 is a deficient number, since it is larger than the sum of its proper divisors (1).

211758228413 is an equidigital number, since it uses as much as digits as its factorization.

211758228413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 44.

The spelling of 211758228413 in words is "two hundred eleven billion, seven hundred fifty-eight million, two hundred twenty-eight thousand, four hundred thirteen".