221213335 has 16 divisors (see below), whose sum is σ = 304975872. Its totient is φ = 150890400.

The previous prime is 221213329. The next prime is 221213353. The reversal of 221213335 is 533312122.

It is not a de Polignac number, because 221213335 - 2¹³ = 221205143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9861 + ... + 23230.

It is an arithmetic number, because the mean of its divisors is an integer number (19060992).

Almost surely, 2^221213335 is an apocalyptic number.

221213335 is a deficient number, since it is larger than the sum of its proper divisors (83762537).

221213335 is a wasteful number, since it uses less digits than its factorization.

221213335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33294.

The product of its digits is 1080, while the sum is 22.

The square root of 221213335 is about 14873.2422490861. The cubic root of 221213335 is about 604.7888387225.

Adding to 221213335 its reverse (533312122), we get a palindrome (754525457).

The spelling of 221213335 in words is "two hundred twenty-one million, two hundred thirteen thousand, three hundred thirty-five".