221223446 has 8 divisors (see below), whose sum is σ = 331965624. Its totient is φ = 110568240.

The previous prime is 221223421. The next prime is 221223451. The reversal of 221223446 is 644322122.

It is a happy number.

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

It is a super-2 number, since 2×221223446² = 97879626120229832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14960 + ... + 25811.

It is an arithmetic number, because the mean of its divisors is an integer number (41495703).

Almost surely, 2^221223446 is an apocalyptic number.

221223446 is a deficient number, since it is larger than the sum of its proper divisors (110742178).

221223446 is a wasteful number, since it uses less digits than its factorization.

221223446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43486.

The product of its digits is 4608, while the sum is 26.

The square root of 221223446 is about 14873.5821509144. The cubic root of 221223446 is about 604.7980529452.

Adding to 221223446 its reverse (644322122), we get a palindrome (865545568).

The spelling of 221223446 in words is "two hundred twenty-one million, two hundred twenty-three thousand, four hundred forty-six".