221343340 has 12 divisors (see below), whose sum is σ = 464821056. Its totient is φ = 88537328.

The previous prime is 221343337. The next prime is 221343371. The reversal of 221343340 is 43343122.

It is a happy 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, 5533564 + ... + 5533603.

It is an arithmetic number, because the mean of its divisors is an integer number (38735088).

Almost surely, 2^221343340 is an apocalyptic number.

221343340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221343340 is an abundant number, since it is smaller than the sum of its proper divisors (243477716).

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

221343340 is a wasteful number, since it uses less digits than its factorization.

221343340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11067176 (or 11067174 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 221343340 is about 14877.6120395714. The cubic root of 221343340 is about 604.9072917617.

Adding to 221343340 its reverse (43343122), we get a palindrome (264686462).

The spelling of 221343340 in words is "two hundred twenty-one million, three hundred forty-three thousand, three hundred forty".