81341136 has 60 divisors (see below), whose sum is σ = 228297888. Its totient is φ = 27035712.

The previous prime is 81341131. The next prime is 81341153. The reversal of 81341136 is 63114318.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81341131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71871 + ... + 72993.

Almost surely, 2^81341136 is an apocalyptic number.

It is an amenable number.

81341136 is an abundant number, since it is smaller than the sum of its proper divisors (146956752).

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

81341136 is a wasteful number, since it uses less digits than its factorization.

81341136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1631 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 81341136 is about 9018.9320875589. The cubic root of 81341136 is about 433.2814317852.

The spelling of 81341136 in words is "eighty-one million, three hundred forty-one thousand, one hundred thirty-six".