221428162 has 8 divisors (see below), whose sum is σ = 351680076. Its totient is φ = 104201472.

The previous prime is 221428127. The next prime is 221428187. The reversal of 221428162 is 261824122.

221428162 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 205033761 + 16394401 = 14319^2 + 4049^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 221428162.

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, 3256263 + ... + 3256330.

Almost surely, 2^221428162 is an apocalyptic number.

221428162 is a deficient number, since it is larger than the sum of its proper divisors (130251914).

221428162 is a wasteful number, since it uses less digits than its factorization.

221428162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6512612.

The product of its digits is 3072, while the sum is 28.

The square root of 221428162 is about 14880.4624256103. The cubic root of 221428162 is about 604.9845516625.

The spelling of 221428162 in words is "two hundred twenty-one million, four hundred twenty-eight thousand, one hundred sixty-two".