67316221 has 32 divisors (see below), whose sum is σ = 86630400. Its totient is φ = 50984640.

The previous prime is 67316213. The next prime is 67316233. The reversal of 67316221 is 12261376.

It is not a de Polignac number, because 67316221 - 2³ = 67316213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67316221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67316251) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 119286 + ... + 119848.

It is an arithmetic number, because the mean of its divisors is an integer number (2707200).

Almost surely, 2^67316221 is an apocalyptic number.

It is an amenable number.

67316221 is a deficient number, since it is larger than the sum of its proper divisors (19314179).

67316221 is a wasteful number, since it uses less digits than its factorization.

67316221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its digits is 3024, while the sum is 28.

The square root of 67316221 is about 8204.6463056003. The cubic root of 67316221 is about 406.7927859148.

Adding to 67316221 its reverse (12261376), we get a palindrome (79577597).

The spelling of 67316221 in words is "sixty-seven million, three hundred sixteen thousand, two hundred twenty-one".