221740113959569 has 4 divisors (see below), whose sum is σ = 221740402901940. Its totient is φ = 221739825017200.

The previous prime is 221740113959543. The next prime is 221740113959591. The reversal of 221740113959569 is 965959311047122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 214614882067600 + 7125231891969 = 14649740^2 + 2669313^2 .

It is a cyclic number.

It is not a de Polignac number, because 221740113959569 - 2³³ = 221731524024977 is a prime.

It is a super-2 number, since 2×221740113959569² (a number of 29 digits) contains 22 as substring.

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 221740113959569.

It is not an unprimeable number, because it can be changed into a prime (221740113959509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143316982 + ... + 144855919.

It is an arithmetic number, because the mean of its divisors is an integer number (55435100725485).

Almost surely, 2^{221740113959569} is an apocalyptic number.

It is an amenable number.

221740113959569 is a deficient number, since it is larger than the sum of its proper divisors (288942371).

221740113959569 is an equidigital number, since it uses as much as digits as its factorization.

221740113959569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288942370.

The product of its (nonzero) digits is 36741600, while the sum is 64.

The spelling of 221740113959569 in words is "two hundred twenty-one trillion, seven hundred forty billion, one hundred thirteen million, nine hundred fifty-nine thousand, five hundred sixty-nine".