221545475740273 has 2 divisors, whose sum is σ = 221545475740274. Its totient is φ = 221545475740272.

The previous prime is 221545475740223. The next prime is 221545475740333. The reversal of 221545475740273 is 372047574545122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212660593254769 + 8884882485504 = 14582887^2 + 2980752^2 .

It is a cyclic number.

It is not a de Polignac number, because 221545475740273 - 2¹³ = 221545475732081 is a prime.

It is a super-2 number, since 2×221545475740273² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221545475740223) by changing a digit.

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 as a sum of consecutive naturals, namely, 110772737870136 + 110772737870137.

It is an arithmetic number, because the mean of its divisors is an integer number (110772737870137).

Almost surely, 2^{221545475740273} is an apocalyptic number.

It is an amenable number.

221545475740273 is a deficient number, since it is larger than the sum of its proper divisors (1).

221545475740273 is an equidigital number, since it uses as much as digits as its factorization.

221545475740273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65856000, while the sum is 58.

The spelling of 221545475740273 in words is "two hundred twenty-one trillion, five hundred forty-five billion, four hundred seventy-five million, seven hundred forty thousand, two hundred seventy-three".