81010441 has 2 divisors, whose sum is σ = 81010442. Its totient is φ = 81010440.

The previous prime is 81010411. The next prime is 81010453. The reversal of 81010441 is 14401018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79281216 + 1729225 = 8904^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 81010441 - 2¹¹ = 81008393 is a prime.

It is not a weakly prime, because it can be changed into another prime (81010411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40505220 + 40505221.

It is an arithmetic number, because the mean of its divisors is an integer number (40505221).

Almost surely, 2^81010441 is an apocalyptic number.

It is an amenable number.

81010441 is a deficient number, since it is larger than the sum of its proper divisors (1).

81010441 is an equidigital number, since it uses as much as digits as its factorization.

81010441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 81010441 is about 9000.5800368643. The cubic root of 81010441 is about 432.6934610685.

Adding to 81010441 its reverse (14401018), we get a palindrome (95411459).

The spelling of 81010441 in words is "eighty-one million, ten thousand, four hundred forty-one".