221313412 has 24 divisors (see below), whose sum is σ = 418811904. Its totient is φ = 101930112.

The previous prime is 221313401. The next prime is 221313427. The reversal of 221313412 is 214313122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221313412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31428 + ... + 37819.

It is an arithmetic number, because the mean of its divisors is an integer number (17450496).

Almost surely, 2^221313412 is an apocalyptic number.

It is an amenable number.

221313412 is a deficient number, since it is larger than the sum of its proper divisors (197498492).

221313412 is a wasteful number, since it uses less digits than its factorization.

221313412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69315 (or 69313 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 221313412 is about 14876.6061989958. The cubic root of 221313412 is about 604.8800272091.

Adding to 221313412 its reverse (214313122), we get a palindrome (435626534).

It can be divided in two parts, 2213 and 13412, that added together give a 6-th power (15625 = 5⁶).

The spelling of 221313412 in words is "two hundred twenty-one million, three hundred thirteen thousand, four hundred twelve".