221466793 has 16 divisors (see below), whose sum is σ = 249851520. Its totient is φ = 195250176.

The previous prime is 221466787. The next prime is 221466829. The reversal of 221466793 is 397664122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221466793 - 2⁵ = 221466761 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (221463793) 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 15 ways as a sum of consecutive naturals, for example, 9321 + ... + 23017.

It is an arithmetic number, because the mean of its divisors is an integer number (15615720).

Almost surely, 2^221466793 is an apocalyptic number.

221466793 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

221466793 is a deficient number, since it is larger than the sum of its proper divisors (28384727).

221466793 is a wasteful number, since it uses less digits than its factorization.

221466793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13776.

The product of its digits is 108864, while the sum is 40.

The square root of 221466793 is about 14881.7604133382. The cubic root of 221466793 is about 605.0197320705.

The spelling of 221466793 in words is "two hundred twenty-one million, four hundred sixty-six thousand, seven hundred ninety-three".