221301164 has 12 divisors (see below), whose sum is σ = 442602384. Its totient is φ = 94843344.

The previous prime is 221301163. The next prime is 221301167. The reversal of 221301164 is 461103122.

221301164 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (221301161) 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 3 ways as a sum of consecutive naturals, for example, 3951779 + ... + 3951834.

It is an arithmetic number, because the mean of its divisors is an integer number (36883532).

Almost surely, 2^221301164 is an apocalyptic number.

It is an amenable number.

221301164 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221301164 is a wasteful number, since it uses less digits than its factorization.

221301164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7903624 (or 7903622 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 221301164 is about 14876.1945402714. The cubic root of 221301164 is about 604.8688685131.

Adding to 221301164 its reverse (461103122), we get a palindrome (682404286).

The spelling of 221301164 in words is "two hundred twenty-one million, three hundred one thousand, one hundred sixty-four".