221422838 has 24 divisors (see below), whose sum is σ = 409151568. Its totient is φ = 87516432.

The previous prime is 221422823. The next prime is 221422853. The reversal of 221422838 is 838224122.

221422838 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221422823) and next prime (221422853).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200195 + ... + 201297.

It is an arithmetic number, because the mean of its divisors is an integer number (17047982).

Almost surely, 2^221422838 is an apocalyptic number.

221422838 is a deficient number, since it is larger than the sum of its proper divisors (187728730).

221422838 is an equidigital number, since it uses as much as digits as its factorization.

221422838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228 (or 1125 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 221422838 is about 14880.2835322449. The cubic root of 221422838 is about 604.9797028912.

It can be divided in two parts, 2214 and 22838, that added together give a palindrome (25052).

The spelling of 221422838 in words is "two hundred twenty-one million, four hundred twenty-two thousand, eight hundred thirty-eight".