81024811 has 8 divisors (see below), whose sum is σ = 95793120. Its totient is φ = 67054848.

The previous prime is 81024809. The next prime is 81024821. The reversal of 81024811 is 11842018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81024811 - 2¹ = 81024809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81024821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199366 + ... + 199771.

It is an arithmetic number, because the mean of its divisors is an integer number (11974140).

Almost surely, 2^81024811 is an apocalyptic number.

81024811 is a deficient number, since it is larger than the sum of its proper divisors (14768309).

81024811 is a wasteful number, since it uses less digits than its factorization.

81024811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399173.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 81024811 is about 9001.3782833519. The cubic root of 81024811 is about 432.7190439331.

Adding to 81024811 its reverse (11842018), we get a palindrome (92866829).

The spelling of 81024811 in words is "eighty-one million, twenty-four thousand, eight hundred eleven".