221800675577 has 6 divisors (see below), whose sum is σ = 240174696222. Its totient is φ = 204739084992.

The previous prime is 221800675511. The next prime is 221800675601. The reversal of 221800675577 is 775576008122.

It can be written as a sum of positive squares in 3 ways, for example, as 11063673856 + 210737001721 = 105184^2 + 459061^2 .

It is not a de Polignac number, because 221800675577 - 2²² = 221796481273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221800675177) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 656214848 + ... + 656215185.

It is an arithmetic number, because the mean of its divisors is an integer number (40029116037).

Almost surely, 2^221800675577 is an apocalyptic number.

It is an amenable number.

221800675577 is a deficient number, since it is larger than the sum of its proper divisors (18374020645).

221800675577 is a wasteful number, since it uses less digits than its factorization.

221800675577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312430059 (or 1312430046 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 50.

The spelling of 221800675577 in words is "two hundred twenty-one billion, eight hundred million, six hundred seventy-five thousand, five hundred seventy-seven".