221369346 has 24 divisors (see below), whose sum is σ = 523237104. Its totient is φ = 67081560.

The previous prime is 221369341. The next prime is 221369381. The reversal of 221369346 is 643963122.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221369346.

It is not an unprimeable number, because it can be changed into a prime (221369341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558816 + ... + 559211.

It is an arithmetic number, because the mean of its divisors is an integer number (21801546).

Almost surely, 2^221369346 is an apocalyptic number.

221369346 is an abundant number, since it is smaller than the sum of its proper divisors (301867758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221369346 is a wasteful number, since it uses less digits than its factorization.

221369346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118046 (or 1118043 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 221369346 is about 14878.4860116882. The cubic root of 221369346 is about 604.9309813578.

The spelling of 221369346 in words is "two hundred twenty-one million, three hundred sixty-nine thousand, three hundred forty-six".