110543981 has 2 divisors, whose sum is σ = 110543982. Its totient is φ = 110543980.

The previous prime is 110543959. The next prime is 110543987. The reversal of 110543981 is 189345011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102191881 + 8352100 = 10109^2 + 2890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110543981 is a prime.

It is a super-2 number, since 2×110543981² = 24439943470656722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110543987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55271990 + 55271991.

It is an arithmetic number, because the mean of its divisors is an integer number (55271991).

Almost surely, 2^110543981 is an apocalyptic number.

It is an amenable number.

110543981 is a deficient number, since it is larger than the sum of its proper divisors (1).

110543981 is an equidigital number, since it uses as much as digits as its factorization.

110543981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 110543981 is about 10513.9897755324. The cubic root of 110543981 is about 479.9305180098.

Adding to 110543981 its reverse (189345011), we get a palindrome (299888992).

The spelling of 110543981 in words is "one hundred ten million, five hundred forty-three thousand, nine hundred eighty-one".