81483136 has 64 divisors (see below), whose sum is σ = 186831360. Its totient is φ = 34675200.

The previous prime is 81483131. The next prime is 81483161. The reversal of 81483136 is 63138418.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81483131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188841 + ... + 189271.

It is an arithmetic number, because the mean of its divisors is an integer number (2919240).

Almost surely, 2^81483136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81483136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93415680).

81483136 is an abundant number, since it is smaller than the sum of its proper divisors (105348224).

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

81483136 is a wasteful number, since it uses less digits than its factorization.

81483136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 651 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 81483136 is about 9026.8009837373. The cubic root of 81483136 is about 433.5334166084.

The spelling of 81483136 in words is "eighty-one million, four hundred eighty-three thousand, one hundred thirty-six".