219621072 has 40 divisors (see below), whose sum is σ = 618933600. Its totient is φ = 66551680.

The previous prime is 219621023. The next prime is 219621091. The reversal of 219621072 is 270126912.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207447 + ... + 208502.

It is an arithmetic number, because the mean of its divisors is an integer number (15473340).

Almost surely, 2^219621072 is an apocalyptic number.

219621072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

219621072 is an abundant number, since it is smaller than the sum of its proper divisors (399312528).

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

219621072 is a wasteful number, since it uses less digits than its factorization.

219621072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415971 (or 415965 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 219621072 is about 14819.6178088370. The cubic root of 219621072 is about 603.3342810712.

Adding to 219621072 its reverse (270126912), we get a palindrome (489747984).

The spelling of 219621072 in words is "two hundred nineteen million, six hundred twenty-one thousand, seventy-two".