405221235443113 has 4 divisors (see below), whose sum is σ = 405233590911940. Its totient is φ = 405208879974288.

The previous prime is 405221235443111. The next prime is 405221235443117. The reversal of 405221235443113 is 311344532122504.

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

It can be written as a sum of positive squares in 2 ways, for example, as 383062675128169 + 22158560314944 = 19571987^2 + 4707288^2 .

It is a cyclic number.

It is not a de Polignac number, because 405221235443113 - 2¹ = 405221235443111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405221235443111) 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, 6177685218 + ... + 6177750811.

It is an arithmetic number, because the mean of its divisors is an integer number (101308397727985).

Almost surely, 2^{405221235443113} is an apocalyptic number.

It is an amenable number.

405221235443113 is a deficient number, since it is larger than the sum of its proper divisors (12355468827).

405221235443113 is a wasteful number, since it uses less digits than its factorization.

405221235443113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12355468826.

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 405221235443113 its reverse (311344532122504), we get a palindrome (716565767565617).

The spelling of 405221235443113 in words is "four hundred five trillion, two hundred twenty-one billion, two hundred thirty-five million, four hundred forty-three thousand, one hundred thirteen".