36165621 has 4 divisors (see below), whose sum is σ = 48220832. Its totient is φ = 24110412.

The previous prime is 36165617. The next prime is 36165629. The reversal of 36165621 is 12656163.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 36165621 - 2² = 36165617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36165629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6027601 + ... + 6027606.

It is an arithmetic number, because the mean of its divisors is an integer number (12055208).

Almost surely, 2^36165621 is an apocalyptic number.

It is an amenable number.

36165621 is a deficient number, since it is larger than the sum of its proper divisors (12055211).

36165621 is a wasteful number, since it uses less digits than its factorization.

36165621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12055210.

The product of its digits is 6480, while the sum is 30.

The square root of 36165621 is about 6013.7859123850. The cubic root of 36165621 is about 330.6983100670.

The spelling of 36165621 in words is "thirty-six million, one hundred sixty-five thousand, six hundred twenty-one".