221244446 has 8 divisors (see below), whose sum is σ = 339961104. Its totient is φ = 107924080.

The previous prime is 221244431. The next prime is 221244461. The reversal of 221244446 is 644442122.

It is an interprime number because it is at equal distance from previous prime (221244431) and next prime (221244461).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348970 + ... + 1349133.

It is an arithmetic number, because the mean of its divisors is an integer number (42495138).

Almost surely, 2^221244446 is an apocalyptic number.

221244446 is a deficient number, since it is larger than the sum of its proper divisors (118716658).

221244446 is a wasteful number, since it uses less digits than its factorization.

221244446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698146.

The product of its digits is 12288, while the sum is 29.

The square root of 221244446 is about 14874.2880838042. The cubic root of 221244446 is about 604.8171894901.

Adding to 221244446 its reverse (644442122), we get a palindrome (865686568).

The spelling of 221244446 in words is "two hundred twenty-one million, two hundred forty-four thousand, four hundred forty-six".