221411669 has 4 divisors (see below), whose sum is σ = 221570220. Its totient is φ = 221253120.

The previous prime is 221411657. The next prime is 221411677. The reversal of 221411669 is 966114122.

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 83631025 + 137780644 = 9145^2 + 11738^2 .

It is a cyclic number.

It is not a de Polignac number, because 221411669 - 2⁴ = 221411653 is a prime.

It is a super-2 number, since 2×221411669² = 98046254338731122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221411609) 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, 77162 + ... + 79979.

It is an arithmetic number, because the mean of its divisors is an integer number (55392555).

Almost surely, 2^221411669 is an apocalyptic number.

It is an amenable number.

221411669 is a deficient number, since it is larger than the sum of its proper divisors (158551).

221411669 is a wasteful number, since it uses less digits than its factorization.

221411669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158550.

The product of its digits is 5184, while the sum is 32.

The square root of 221411669 is about 14879.9082322439. The cubic root of 221411669 is about 604.9695306013.

The spelling of 221411669 in words is "two hundred twenty-one million, four hundred eleven thousand, six hundred sixty-nine".