221434342306 has 4 divisors (see below), whose sum is σ = 332151513462. Its totient is φ = 110717171152.

The previous prime is 221434342291. The next prime is 221434342309. The reversal of 221434342306 is 603243434122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 209298015081 + 12136327225 = 457491^2 + 110165^2 .

It is not an unprimeable number, because it can be changed into a prime (221434342309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55358585575 + ... + 55358585578.

Almost surely, 2^221434342306 is an apocalyptic number.

221434342306 is a deficient number, since it is larger than the sum of its proper divisors (110717171156).

221434342306 is a wasteful number, since it uses less digits than its factorization.

221434342306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110717171155.

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 221434342306 its reverse (603243434122), we get a palindrome (824677776428).

The spelling of 221434342306 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred forty-two thousand, three hundred six".