221365730543 has 2 divisors, whose sum is σ = 221365730544. Its totient is φ = 221365730542.

The previous prime is 221365730539. The next prime is 221365730587. The reversal of 221365730543 is 345037563122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221365730543 - 2² = 221365730539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221365730543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221365730513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110682865271 + 110682865272.

It is an arithmetic number, because the mean of its divisors is an integer number (110682865272).

Almost surely, 2^221365730543 is an apocalyptic number.

221365730543 is a deficient number, since it is larger than the sum of its proper divisors (1).

221365730543 is an equidigital number, since it uses as much as digits as its factorization.

221365730543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 41.

The spelling of 221365730543 in words is "two hundred twenty-one billion, three hundred sixty-five million, seven hundred thirty thousand, five hundred forty-three".