221331147240443 has 16 divisors (see below), whose sum is σ = 234499519581600. Its totient is φ = 208317007664640.

The previous prime is 221331147240433. The next prime is 221331147240449. The reversal of 221331147240443 is 344042741133122.

It is a cyclic number.

It is not a de Polignac number, because 221331147240443 - 2³⁸ = 221056269333499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221331147240443.

It is not an unprimeable number, because it can be changed into a prime (221331147240449) 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, 28422596 + ... + 35362497.

It is an arithmetic number, because the mean of its divisors is an integer number (14656219973850).

Almost surely, 2^{221331147240443} is an apocalyptic number.

221331147240443 is a deficient number, since it is larger than the sum of its proper divisors (13168372341157).

221331147240443 is a wasteful number, since it uses less digits than its factorization.

221331147240443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63786302.

The product of its (nonzero) digits is 387072, while the sum is 41.

Adding to 221331147240443 its reverse (344042741133122), we get a palindrome (565373888373565).

The spelling of 221331147240443 in words is "two hundred twenty-one trillion, three hundred thirty-one billion, one hundred forty-seven million, two hundred forty thousand, four hundred forty-three".