221085295649 has 8 divisors (see below), whose sum is σ = 224717213160. Its totient is φ = 217453622400.

The previous prime is 221085295621. The next prime is 221085295679. The reversal of 221085295649 is 946592580122.

It can be written as a sum of positive squares in 4 ways, for example, as 16478343424 + 204606952225 = 128368^2 + 452335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221085295649 - 2⁸ = 221085295393 is a prime.

It is a super-3 number, since 3×221085295649³ (a number of 35 digits) contains 333 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 221085295649.

It is not an unprimeable number, because it can be changed into a prime (221085295609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3074789 + ... + 3145869.

It is an arithmetic number, because the mean of its divisors is an integer number (28089651645).

Almost surely, 2^221085295649 is an apocalyptic number.

It is an amenable number.

221085295649 is a deficient number, since it is larger than the sum of its proper divisors (3631917511).

221085295649 is an equidigital number, since it uses as much as digits as its factorization.

221085295649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122131.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 221085295649 in words is "two hundred twenty-one billion, eighty-five million, two hundred ninety-five thousand, six hundred forty-nine".