82801011 has 4 divisors (see below), whose sum is σ = 110401352. Its totient is φ = 55200672.

The previous prime is 82801009. The next prime is 82801021. The reversal of 82801011 is 11010828.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 82801011 - 2¹ = 82801009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82801021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13800166 + ... + 13800171.

It is an arithmetic number, because the mean of its divisors is an integer number (27600338).

Almost surely, 2^82801011 is an apocalyptic number.

82801011 is a deficient number, since it is larger than the sum of its proper divisors (27600341).

82801011 is a wasteful number, since it uses less digits than its factorization.

82801011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27600340.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 82801011 is about 9099.5060854972. The cubic root of 82801011 is about 435.8581921760.

Adding to 82801011 its reverse (11010828), we get a palindrome (93811839).

The spelling of 82801011 in words is "eighty-two million, eight hundred one thousand, eleven".