221434422 has 16 divisors (see below), whose sum is σ = 483129792. Its totient is φ = 67101320.

The previous prime is 221434361. The next prime is 221434471. The reversal of 221434422 is 224434122.

221434422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221434392 and 221434401.

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, 1677468 + ... + 1677599.

It is an arithmetic number, because the mean of its divisors is an integer number (30195612).

Almost surely, 2^221434422 is an apocalyptic number.

221434422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221434422 is an abundant number, since it is smaller than the sum of its proper divisors (261695370).

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

221434422 is a wasteful number, since it uses less digits than its factorization.

221434422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355083.

The product of its digits is 3072, while the sum is 24.

The square root of 221434422 is about 14880.6727670492. The cubic root of 221434422 is about 604.9902527856.

Adding to 221434422 its reverse (224434122), we get a palindrome (445868544).

It can be divided in two parts, 22143 and 4422, that added together give a triangular number (26565 = T₂₃₀).

The spelling of 221434422 in words is "two hundred twenty-one million, four hundred thirty-four thousand, four hundred twenty-two".