81282136 has 16 divisors (see below), whose sum is σ = 164127600. Its totient is φ = 37514784.

The previous prime is 81282127. The next prime is 81282163. The reversal of 81282136 is 63128218.

It is a junction number, because it is equal to n+sod(n) for n = 81282098 and 81282107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390676 + ... + 390883.

It is an arithmetic number, because the mean of its divisors is an integer number (10257975).

Almost surely, 2^81282136 is an apocalyptic number.

It is an amenable number.

81282136 is an abundant number, since it is smaller than the sum of its proper divisors (82845464).

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

81282136 is a wasteful number, since it uses less digits than its factorization.

81282136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781578 (or 781574 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 81282136 is about 9015.6605969835. The cubic root of 81282136 is about 433.1766476255.

It can be divided in two parts, 81282 and 136, that added together give a palindrome (81418).

The spelling of 81282136 in words is "eighty-one million, two hundred eighty-two thousand, one hundred thirty-six".