221434126 has 8 divisors (see below), whose sum is σ = 332829144. Its totient is φ = 110491080.

The previous prime is 221434099. The next prime is 221434193. The reversal of 221434126 is 621434122.

It is a happy number.

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 221434126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111765 + ... + 113728.

It is an arithmetic number, because the mean of its divisors is an integer number (41603643).

Almost surely, 2^221434126 is an apocalyptic number.

221434126 is a deficient number, since it is larger than the sum of its proper divisors (111395018).

221434126 is a wasteful number, since it uses less digits than its factorization.

221434126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225986.

The product of its digits is 2304, while the sum is 25.

The square root of 221434126 is about 14880.6628212590. The cubic root of 221434126 is about 604.9899832142.

Adding to 221434126 its reverse (621434122), we get a palindrome (842868248).

The spelling of 221434126 in words is "two hundred twenty-one million, four hundred thirty-four thousand, one hundred twenty-six".