81032611 has 16 divisors (see below), whose sum is σ = 93040128. Its totient is φ = 70436520.

The previous prime is 81032599. The next prime is 81032621. The reversal of 81032611 is 11623018.

It is not a de Polignac number, because 81032611 - 2²³ = 72644003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81032621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29290 + ... + 31936.

It is an arithmetic number, because the mean of its divisors is an integer number (5815008).

Almost surely, 2^81032611 is an apocalyptic number.

81032611 is a deficient number, since it is larger than the sum of its proper divisors (12007517).

81032611 is a wasteful number, since it uses less digits than its factorization.

81032611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703 (or 2681 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 81032611 is about 9001.8115399068. The cubic root of 81032611 is about 432.7329289814.

Adding to 81032611 its reverse (11623018), we get a palindrome (92655629).

The spelling of 81032611 in words is "eighty-one million, thirty-two thousand, six hundred eleven".