81102611 has 8 divisors (see below), whose sum is σ = 82875648. Its totient is φ = 79344000.

The previous prime is 81102599. The next prime is 81102617. The reversal of 81102611 is 11620118.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81102611 is a prime.

It is a super-2 number, since 2×81102611² = 13155267022034642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81102617) 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 in 7 ways as a sum of consecutive naturals, for example, 8171 + ... + 15131.

It is an arithmetic number, because the mean of its divisors is an integer number (10359456).

Almost surely, 2^81102611 is an apocalyptic number.

81102611 is a deficient number, since it is larger than the sum of its proper divisors (1773037).

81102611 is a wasteful number, since it uses less digits than its factorization.

81102611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7213.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 81102611 is about 9005.6988068667. The cubic root of 81102611 is about 432.8574985280.

Adding to 81102611 its reverse (11620118), we get a palindrome (92722729).

The spelling of 81102611 in words is "eighty-one million, one hundred two thousand, six hundred eleven".