221282814 has 16 divisors (see below), whose sum is σ = 447898752. Its totient is φ = 72872088.

The previous prime is 221282777. The next prime is 221282827. The reversal of 221282814 is 418282122.

221282814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221674 + ... + 222669.

It is an arithmetic number, because the mean of its divisors is an integer number (27993672).

Almost surely, 2^221282814 is an apocalyptic number.

221282814 is an abundant number, since it is smaller than the sum of its proper divisors (226615938).

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

221282814 is a wasteful number, since it uses less digits than its factorization.

221282814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444431.

The product of its digits is 4096, while the sum is 30.

The square root of 221282814 is about 14875.5777702918. The cubic root of 221282814 is about 604.8521497419.

It can be divided in two parts, 22128 and 2814, that added together give a palindrome (24942).

The spelling of 221282814 in words is "two hundred twenty-one million, two hundred eighty-two thousand, eight hundred fourteen".