221344569 has 12 divisors (see below), whose sum is σ = 331561776. Its totient is φ = 147562884.

The previous prime is 221344567. The next prime is 221344597. The reversal of 221344569 is 965443122.

It is a happy number.

It is not a de Polignac number, because 221344569 - 2¹ = 221344567 is a prime.

It is a super-2 number, since 2×221344569² = 97986836451591522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221344561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 455199 + ... + 455684.

It is an arithmetic number, because the mean of its divisors is an integer number (27630148).

Almost surely, 2^221344569 is an apocalyptic number.

It is an amenable number.

221344569 is a deficient number, since it is larger than the sum of its proper divisors (110217207).

221344569 is an frugal number, since it uses more digits than its factorization.

221344569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910898 (or 910886 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 221344569 is about 14877.6533431855. The cubic root of 221344569 is about 604.9084113341.

The spelling of 221344569 in words is "two hundred twenty-one million, three hundred forty-four thousand, five hundred sixty-nine".