81062441 has 2 divisors, whose sum is σ = 81062442. Its totient is φ = 81062440.

The previous prime is 81062411. The next prime is 81062491. The reversal of 81062441 is 14426018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72675625 + 8386816 = 8525^2 + 2896^2 .

It is a cyclic number.

It is not a de Polignac number, because 81062441 - 2¹⁴ = 81046057 is a prime.

It is a super-2 number, since 2×81062441² = 13142238681756962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81062441.

It is not a weakly prime, because it can be changed into another prime (81062411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40531220 + 40531221.

It is an arithmetic number, because the mean of its divisors is an integer number (40531221).

Almost surely, 2^81062441 is an apocalyptic number.

It is an amenable number.

81062441 is a deficient number, since it is larger than the sum of its proper divisors (1).

81062441 is an equidigital number, since it uses as much as digits as its factorization.

81062441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 81062441 is about 9003.4682761700. The cubic root of 81062441 is about 432.7860221722.

Adding to 81062441 its reverse (14426018), we get a palindrome (95488459).

The spelling of 81062441 in words is "eighty-one million, sixty-two thousand, four hundred forty-one".