36181530 has 192 divisors, whose sum is σ = 122923008. Its totient is φ = 7159680.

The previous prime is 36181513. The next prime is 36181543. The reversal of 36181530 is 3518163.

36181530 is a `hidden beast` number, since 3 + 618 + 15 + 30 = 666.

It is a super-2 number, since 2×36181530² = 2618206226281800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 36181494 and 36181503.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 159277 + ... + 159503.

It is an arithmetic number, because the mean of its divisors is an integer number (640224).

It is a vampire number, since it can be written as 5313 ⋅ 6810 (with its own digits).

Almost surely, 2^36181530 is an apocalyptic number.

36181530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 36181530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61461504).

36181530 is an abundant number, since it is smaller than the sum of its proper divisors (86741478).

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

36181530 is a wasteful number, since it uses less digits than its factorization.

36181530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 36181530 is about 6015.1084778248. The cubic root of 36181530 is about 330.7467935717.

Adding to 36181530 its reverse (3518163), we get a palindrome (39699693).

The spelling of 36181530 in words is "thirty-six million, one hundred eighty-one thousand, five hundred thirty".