2117348271581 has 2 divisors, whose sum is σ = 2117348271582. Its totient is φ = 2117348271580.

The previous prime is 2117348271553. The next prime is 2117348271587. The reversal of 2117348271581 is 1851728437112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1883643706681 + 233704564900 = 1372459^2 + 483430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2117348271581 - 2¹⁸ = 2117348009437 is a prime.

It is a super-2 number, since 2×2117348271581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117348271587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058674135790 + 1058674135791.

It is an arithmetic number, because the mean of its divisors is an integer number (1058674135791).

Almost surely, 2^{2117348271581} is an apocalyptic number.

It is an amenable number.

2117348271581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117348271581 is an equidigital number, since it uses as much as digits as its factorization.

2117348271581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 50.

The spelling of 2117348271581 in words is "two trillion, one hundred seventeen billion, three hundred forty-eight million, two hundred seventy-one thousand, five hundred eighty-one".