221326126 has 8 divisors (see below), whose sum is σ = 379416240. Its totient is φ = 94854048.

The previous prime is 221326123. The next prime is 221326139. The reversal of 221326126 is 621623122.

221326126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221326126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221326121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7904491 + ... + 7904518.

It is an arithmetic number, because the mean of its divisors is an integer number (47427030).

Almost surely, 2^221326126 is an apocalyptic number.

221326126 is a deficient number, since it is larger than the sum of its proper divisors (158090114).

221326126 is a wasteful number, since it uses less digits than its factorization.

221326126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15809018.

The product of its digits is 1728, while the sum is 25.

The square root of 221326126 is about 14877.0335080620. The cubic root of 221326126 is about 604.8916100248.

Adding to 221326126 its reverse (621623122), we get a palindrome (842949248).

The spelling of 221326126 in words is "two hundred twenty-one million, three hundred twenty-six thousand, one hundred twenty-six".