36986221 has 4 divisors (see below), whose sum is σ = 37028992. Its totient is φ = 36943452.

The previous prime is 36986219. The next prime is 36986239. The reversal of 36986221 is 12268963.

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 a cyclic number.

It is not a de Polignac number, because 36986221 - 2¹ = 36986219 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 (36986251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20061 + ... + 21826.

It is an arithmetic number, because the mean of its divisors is an integer number (9257248).

Almost surely, 2^36986221 is an apocalyptic number.

It is an amenable number.

36986221 is a deficient number, since it is larger than the sum of its proper divisors (42771).

36986221 is an equidigital number, since it uses as much as digits as its factorization.

36986221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42770.

The product of its digits is 31104, while the sum is 37.

The square root of 36986221 is about 6081.6297980065. The cubic root of 36986221 is about 333.1808154477.

The spelling of 36986221 in words is "thirty-six million, nine hundred eighty-six thousand, two hundred twenty-one".