81067441 has 48 divisors (see below), whose sum is σ = 110678400. Its totient is φ = 57867264.

The previous prime is 81067423. The next prime is 81067453. The reversal of 81067441 is 14476018.

It is not a de Polignac number, because 81067441 - 2¹¹ = 81065393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81067241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 583150 + ... + 583288.

It is an arithmetic number, because the mean of its divisors is an integer number (2305800).

Almost surely, 2^81067441 is an apocalyptic number.

It is an amenable number.

81067441 is a deficient number, since it is larger than the sum of its proper divisors (29610959).

81067441 is a wasteful number, since it uses less digits than its factorization.

81067441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 81067441 is about 9003.7459426619. The cubic root of 81067441 is about 432.7949201920.

The spelling of 81067441 in words is "eighty-one million, sixty-seven thousand, four hundred forty-one".