105881681 has 2 divisors, whose sum is σ = 105881682. Its totient is φ = 105881680.

The previous prime is 105881617. The next prime is 105881707. The reversal of 105881681 is 186188501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 23435281 = 9080^2 + 4841^2 .

It is an emirp because it is prime and its reverse (186188501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105881681 - 2⁶ = 105881617 is a prime.

It is a super-2 number, since 2×105881681² = 22421860742771522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (105881381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52940840 + 52940841.

It is an arithmetic number, because the mean of its divisors is an integer number (52940841).

Almost surely, 2^105881681 is an apocalyptic number.

It is an amenable number.

105881681 is a deficient number, since it is larger than the sum of its proper divisors (1).

105881681 is an equidigital number, since it uses as much as digits as its factorization.

105881681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 38.

The square root of 105881681 is about 10289.8824580264. The cubic root of 105881681 is about 473.0861957347.

The spelling of 105881681 in words is "one hundred five million, eight hundred eighty-one thousand, six hundred eighty-one".