36131809 has 8 divisors (see below), whose sum is σ = 41791680. Its totient is φ = 30596496.

The previous prime is 36131807. The next prime is 36131819. The reversal of 36131809 is 90813163.

36131809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 36131809 - 2¹ = 36131807 is a prime.

It is a super-2 number, since 2×36131809² = 2611015243224962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36131801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30514 + ... + 31675.

It is an arithmetic number, because the mean of its divisors is an integer number (5223960).

Almost surely, 2^36131809 is an apocalyptic number.

It is an amenable number.

36131809 is a deficient number, since it is larger than the sum of its proper divisors (5659871).

36131809 is an equidigital number, since it uses as much as digits as its factorization.

36131809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62279.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 36131809 is about 6010.9740475234. The cubic root of 36131809 is about 330.5952189970.

The spelling of 36131809 in words is "thirty-six million, one hundred thirty-one thousand, eight hundred nine".