36221215 has 4 divisors (see below), whose sum is σ = 43465464. Its totient is φ = 28976968.

The previous prime is 36221209. The next prime is 36221219. The reversal of 36221215 is 51212263.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 36221215 - 2¹⁵ = 36188447 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 (36221219) 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, 3622117 + ... + 3622126.

It is an arithmetic number, because the mean of its divisors is an integer number (10866366).

Almost surely, 2^36221215 is an apocalyptic number.

36221215 is a deficient number, since it is larger than the sum of its proper divisors (7244249).

36221215 is an equidigital number, since it uses as much as digits as its factorization.

36221215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244248.

The product of its digits is 720, while the sum is 22.

The square root of 36221215 is about 6018.4063505217. The cubic root of 36221215 is about 330.8676737606.

Adding to 36221215 its reverse (51212263), we get a palindrome (87433478).

The spelling of 36221215 in words is "thirty-six million, two hundred twenty-one thousand, two hundred fifteen".