221533661055443 has 16 divisors (see below), whose sum is σ = 245034898907136. Its totient is φ = 198593879250240.

The previous prime is 221533661055397. The next prime is 221533661055467. The reversal of 221533661055443 is 344550166335122.

It is a cyclic number.

It is not a de Polignac number, because 221533661055443 - 2²⁴ = 221533644278227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221533661055391 and 221533661055400.

It is not an unprimeable number, because it can be changed into a prime (221533661055143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24999155 + ... + 32680652.

It is an arithmetic number, because the mean of its divisors is an integer number (15314681181696).

Almost surely, 2^{221533661055443} is an apocalyptic number.

221533661055443 is a deficient number, since it is larger than the sum of its proper divisors (23501237851693).

221533661055443 is a wasteful number, since it uses less digits than its factorization.

221533661055443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57684674.

The product of its (nonzero) digits is 7776000, while the sum is 50.

The spelling of 221533661055443 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred sixty-one million, fifty-five thousand, four hundred forty-three".