221065952449 has 8 divisors (see below), whose sum is σ = 223251305472. Its totient is φ = 218881351200.

The previous prime is 221065952447. The next prime is 221065952461. The reversal of 221065952449 is 944259560122.

It is a happy number.

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 221065952449 - 2¹ = 221065952447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221065952447) 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, 412512 + ... + 782494.

It is an arithmetic number, because the mean of its divisors is an integer number (27906413184).

Almost surely, 2^221065952449 is an apocalyptic number.

It is an amenable number.

221065952449 is a deficient number, since it is larger than the sum of its proper divisors (2185353023).

221065952449 is a wasteful number, since it uses less digits than its factorization.

221065952449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375887.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 221065952449 in words is "two hundred twenty-one billion, sixty-five million, nine hundred fifty-two thousand, four hundred forty-nine".