219581020 has 12 divisors (see below), whose sum is σ = 461120184. Its totient is φ = 87832400.

The previous prime is 219581017. The next prime is 219581041. The reversal of 219581020 is 20185912.

It is a self number, because there is not a number n which added to its sum of digits gives 219581020.

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 3 ways as a sum of consecutive naturals, for example, 5489506 + ... + 5489545.

It is an arithmetic number, because the mean of its divisors is an integer number (38426682).

Almost surely, 2^219581020 is an apocalyptic number.

219581020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

219581020 is an abundant number, since it is smaller than the sum of its proper divisors (241539164).

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

219581020 is a wasteful number, since it uses less digits than its factorization.

219581020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10979060 (or 10979058 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 219581020 is about 14818.2664303217. The cubic root of 219581020 is about 603.2976024205.

The spelling of 219581020 in words is "two hundred nineteen million, five hundred eighty-one thousand, twenty".