227213165 has 4 divisors (see below), whose sum is σ = 272655804. Its totient is φ = 181770528.

The previous prime is 227213137. The next prime is 227213201. The reversal of 227213165 is 561312722.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 142038724 + 85174441 = 11918^2 + 9229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-227213165 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22721312 + ... + 22721321.

It is an arithmetic number, because the mean of its divisors is an integer number (68163951).

Almost surely, 2^227213165 is an apocalyptic number.

It is an amenable number.

227213165 is a deficient number, since it is larger than the sum of its proper divisors (45442639).

227213165 is an equidigital number, since it uses as much as digits as its factorization.

227213165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45442638.

The product of its digits is 5040, while the sum is 29.

The square root of 227213165 is about 15073.5916423393. The cubic root of 227213165 is about 610.2079063775.

Adding to 227213165 its reverse (561312722), we get a palindrome (788525887).

The spelling of 227213165 in words is "two hundred twenty-seven million, two hundred thirteen thousand, one hundred sixty-five".