221240344 has 32 divisors (see below), whose sum is σ = 448373520. Its totient is φ = 101736576.

The previous prime is 221240317. The next prime is 221240377. The reversal of 221240344 is 443042122.

It is a happy number.

221240344 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25674 + ... + 33190.

Almost surely, 2^221240344 is an apocalyptic number.

It is an amenable number.

221240344 is an abundant number, since it is smaller than the sum of its proper divisors (227133176).

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

221240344 is a wasteful number, since it uses less digits than its factorization.

221240344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7819 (or 7815 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 221240344 is about 14874.1501942128. The cubic root of 221240344 is about 604.8134515802.

Adding to 221240344 its reverse (443042122), we get a palindrome (664282466).

The spelling of 221240344 in words is "two hundred twenty-one million, two hundred forty thousand, three hundred forty-four".