81435116 has 12 divisors (see below), whose sum is σ = 162870288. Its totient is φ = 34900752.

The previous prime is 81435091. The next prime is 81435119. The reversal of 81435116 is 61153418.

81435116 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (81435119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454171 + ... + 1454226.

It is an arithmetic number, because the mean of its divisors is an integer number (13572524).

Almost surely, 2^81435116 is an apocalyptic number.

It is an amenable number.

81435116 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81435116 is a wasteful number, since it uses less digits than its factorization.

81435116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908408 (or 2908406 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 81435116 is about 9024.1407347182. The cubic root of 81435116 is about 433.4482359334.

The spelling of 81435116 in words is "eighty-one million, four hundred thirty-five thousand, one hundred sixteen".