220669447 has 4 divisors (see below), whose sum is σ = 222150600. Its totient is φ = 219188296.

The previous prime is 220669441. The next prime is 220669459. The reversal of 220669447 is 744966022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220669447 - 2¹¹ = 220667399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220669441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740353 + ... + 740650.

It is an arithmetic number, because the mean of its divisors is an integer number (55537650).

Almost surely, 2^220669447 is an apocalyptic number.

220669447 is a deficient number, since it is larger than the sum of its proper divisors (1481153).

220669447 is a wasteful number, since it uses less digits than its factorization.

220669447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481152.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 220669447 is about 14854.9468864752. The cubic root of 220669447 is about 604.2927755862.

It can be divided in two parts, 22066 and 9447, that added together give a palindrome (31513).

The spelling of 220669447 in words is "two hundred twenty million, six hundred sixty-nine thousand, four hundred forty-seven".