221533612413353 has 8 divisors (see below), whose sum is σ = 224807986865448. Its totient is φ = 218265715459584.

The previous prime is 221533612413343. The next prime is 221533612413383. The reversal of 221533612413353 is 353314216335122.

It can be written as a sum of positive squares in 4 ways, for example, as 9304744935424 + 212228867477929 = 3050368^2 + 14568077^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221533612413353 - 2¹⁸ = 221533612151209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221533612413343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1619305676 + ... + 1619442477.

It is an arithmetic number, because the mean of its divisors is an integer number (28100998358181).

Almost surely, 2^{221533612413353} is an apocalyptic number.

It is an amenable number.

221533612413353 is a deficient number, since it is larger than the sum of its proper divisors (3274374452095).

221533612413353 is an equidigital number, since it uses as much as digits as its factorization.

221533612413353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238749163.

The product of its digits is 1166400, while the sum is 44.

Adding to 221533612413353 its reverse (353314216335122), we get a palindrome (574847828748475).

The spelling of 221533612413353 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred twelve million, four hundred thirteen thousand, three hundred fifty-three".