2181242471417 has 2 divisors, whose sum is σ = 2181242471418. Its totient is φ = 2181242471416.

The previous prime is 2181242471381. The next prime is 2181242471423. The reversal of 2181242471417 is 7141742421812.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1825711713721 + 355530757696 = 1351189^2 + 596264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2181242471417 is a prime.

It is a super-2 number, since 2×2181242471417² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2181242471477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090621235708 + 1090621235709.

It is an arithmetic number, because the mean of its divisors is an integer number (1090621235709).

Almost surely, 2^{2181242471417} is an apocalyptic number.

It is an amenable number.

2181242471417 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181242471417 is an equidigital number, since it uses as much as digits as its factorization.

2181242471417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 200704, while the sum is 44.

The spelling of 2181242471417 in words is "two trillion, one hundred eighty-one billion, two hundred forty-two million, four hundred seventy-one thousand, four hundred seventeen".