221313434344 has 16 divisors (see below), whose sum is σ = 429271748100. Its totient is φ = 106840968192.

The previous prime is 221313434339. The next prime is 221313434351. The reversal of 221313434344 is 443434313122.

It can be written as a sum of positive squares in 2 ways, for example, as 201186337444 + 20127096900 = 448538^2 + 141870^2 .

It is a super-2 number, since 2×221313434344² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476968377 + ... + 476968840.

Almost surely, 2^221313434344 is an apocalyptic number.

It is an amenable number.

221313434344 is a deficient number, since it is larger than the sum of its proper divisors (207958313756).

221313434344 is a wasteful number, since it uses less digits than its factorization.

221313434344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953937252 (or 953937248 counting only the distinct ones).

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

Adding to 221313434344 its reverse (443434313122), we get a palindrome (664747747466).

The spelling of 221313434344 in words is "two hundred twenty-one billion, three hundred thirteen million, four hundred thirty-four thousand, three hundred forty-four".