221533612413355 has 64 divisors (see below), whose sum is σ = 307145786830848. Its totient is φ = 151804028914560.

The previous prime is 221533612413343. The next prime is 221533612413383. The reversal of 221533612413355 is 553314216335122.

It is not a de Polignac number, because 221533612413355 - 2¹³ = 221533612405163 is a prime.

It is a super-3 number, since 3×221533612413355³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3309055992 + ... + 3309122938.

It is an arithmetic number, because the mean of its divisors is an integer number (4799152919232).

Almost surely, 2^{221533612413355} is an apocalyptic number.

221533612413355 is a deficient number, since it is larger than the sum of its proper divisors (85612174417493).

221533612413355 is a wasteful number, since it uses less digits than its factorization.

221533612413355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106096.

The product of its digits is 1944000, while the sum is 46.

Adding to 221533612413355 its reverse (553314216335122), we get a palindrome (774847828748477).

The spelling of 221533612413355 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred twelve million, four hundred thirteen thousand, three hundred fifty-five".