221433126434756 has 12 divisors (see below), whose sum is σ = 387526486767420. Its totient is φ = 110711273072640.

The previous prime is 221433126434701. The next prime is 221433126434759. The reversal of 221433126434756 is 657434621334122.

It can be written as a sum of positive squares in 2 ways, for example, as 99225186681856 + 122207939752900 = 9961184^2 + 11054770^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221433126434698 and 221433126434707.

It is not an unprimeable number, because it can be changed into a prime (221433126434759) 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, 1322442005 + ... + 1322609436.

It is an arithmetic number, because the mean of its divisors is an integer number (32293873897285).

Almost surely, 2^{221433126434756} is an apocalyptic number.

It is an amenable number.

221433126434756 is a deficient number, since it is larger than the sum of its proper divisors (166093360332664).

221433126434756 is a wasteful number, since it uses less digits than its factorization.

221433126434756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645072374 (or 2645072372 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 53.

Adding to 221433126434756 its reverse (657434621334122), we get a palindrome (878867747768878).

The spelling of 221433126434756 in words is "two hundred twenty-one trillion, four hundred thirty-three billion, one hundred twenty-six million, four hundred thirty-four thousand, seven hundred fifty-six".