211545451417 has 2 divisors, whose sum is σ = 211545451418. Its totient is φ = 211545451416.

The previous prime is 211545451409. The next prime is 211545451477. The reversal of 211545451417 is 714154545112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205844597401 + 5700854016 = 453701^2 + 75504^2 .

It is a cyclic number.

It is not a de Polignac number, because 211545451417 - 2³ = 211545451409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211545451417.

It is not a weakly prime, because it can be changed into another prime (211545451477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105772725708 + 105772725709.

It is an arithmetic number, because the mean of its divisors is an integer number (105772725709).

Almost surely, 2^211545451417 is an apocalyptic number.

It is an amenable number.

211545451417 is a deficient number, since it is larger than the sum of its proper divisors (1).

211545451417 is an equidigital number, since it uses as much as digits as its factorization.

211545451417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112000, while the sum is 40.

Adding to 211545451417 its reverse (714154545112), we get a palindrome (925699996529).

The spelling of 211545451417 in words is "two hundred eleven billion, five hundred forty-five million, four hundred fifty-one thousand, four hundred seventeen".