221544445352143 has 2 divisors, whose sum is σ = 221544445352144. Its totient is φ = 221544445352142.

The previous prime is 221544445352137. The next prime is 221544445352207. The reversal of 221544445352143 is 341253544445122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221544445352143 - 2³³ = 221535855417551 is a prime.

It is a super-2 number, since 2×221544445352143² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221544445322143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110772222676071 + 110772222676072.

It is an arithmetic number, because the mean of its divisors is an integer number (110772222676072).

Almost surely, 2^{221544445352143} is an apocalyptic number.

221544445352143 is a deficient number, since it is larger than the sum of its proper divisors (1).

221544445352143 is an equidigital number, since it uses as much as digits as its factorization.

221544445352143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216000, while the sum is 49.

Adding to 221544445352143 its reverse (341253544445122), we get a palindrome (562797989797265).

The spelling of 221544445352143 in words is "two hundred twenty-one trillion, five hundred forty-four billion, four hundred forty-five million, three hundred fifty-two thousand, one hundred forty-three".