36221609 has 16 divisors (see below), whose sum is σ = 39621120. Its totient is φ = 33022080.

The previous prime is 36221597. The next prime is 36221621. The reversal of 36221609 is 90612263.

It is an interprime number because it is at equal distance from previous prime (36221597) and next prime (36221621).

It is a cyclic number.

It is not a de Polignac number, because 36221609 - 2²⁴ = 19444393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36221629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38189 + ... + 39125.

It is an arithmetic number, because the mean of its divisors is an integer number (2476320).

Almost surely, 2^36221609 is an apocalyptic number.

It is an amenable number.

36221609 is a deficient number, since it is larger than the sum of its proper divisors (3399511).

36221609 is a wasteful number, since it uses less digits than its factorization.

36221609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 36221609 is about 6018.4390833504. The cubic root of 36221609 is about 330.8688734387.

The spelling of 36221609 in words is "thirty-six million, two hundred twenty-one thousand, six hundred nine".