8181536 has 36 divisors (see below), whose sum is σ = 17713206. Its totient is φ = 3717120.

The previous prime is 8181529. The next prime is 8181577. The reversal of 8181536 is 6351818.

8181536 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8179600 + 1936 = 2860^2 + 44^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2816 + ... + 4928.

Almost surely, 2^8181536 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 8181536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8856603).

8181536 is an abundant number, since it is smaller than the sum of its proper divisors (9531670).

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

8181536 is a wasteful number, since it uses less digits than its factorization.

8181536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145 (or 2126 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 8181536 is about 2860.3384415135. The cubic root of 8181536 is about 201.5014992900.

The spelling of 8181536 in words is "eight million, one hundred eighty-one thousand, five hundred thirty-six".