221620314 has 8 divisors (see below), whose sum is σ = 443240640. Its totient is φ = 73873436.

The previous prime is 221620297. The next prime is 221620337. The reversal of 221620314 is 413026122.

221620314 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

221620314 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18468354 + ... + 18468365.

It is an arithmetic number, because the mean of its divisors is an integer number (55405080).

Almost surely, 2^221620314 is an apocalyptic number.

221620314 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.

221620314 is a wasteful number, since it uses less digits than its factorization.

221620314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36936724.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 221620314 is about 14886.9175452812. The cubic root of 221620314 is about 605.1594998720.

Adding to 221620314 its reverse (413026122), we get a palindrome (634646436).

The spelling of 221620314 in words is "two hundred twenty-one million, six hundred twenty thousand, three hundred fourteen".