221568116 has 24 divisors (see below), whose sum is σ = 483422016. Its totient is φ = 86325120.

The previous prime is 221568107. The next prime is 221568119. The reversal of 221568116 is 611865122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221568119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359381 + ... + 359996.

It is an arithmetic number, because the mean of its divisors is an integer number (20142584).

Almost surely, 2^221568116 is an apocalyptic number.

It is an amenable number.

221568116 is an abundant number, since it is smaller than the sum of its proper divisors (261853900).

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

221568116 is a wasteful number, since it uses less digits than its factorization.

221568116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719399 (or 719397 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 221568116 is about 14885.1642920056. The cubic root of 221568116 is about 605.1119852808. Note that the first 3 decimals are identical.

The spelling of 221568116 in words is "two hundred twenty-one million, five hundred sixty-eight thousand, one hundred sixteen".