219240920 has 16 divisors (see below), whose sum is σ = 493292160. Its totient is φ = 87696352.

The previous prime is 219240911. The next prime is 219240937. The reversal of 219240920 is 29042912.

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, 2740472 + ... + 2740551.

It is an arithmetic number, because the mean of its divisors is an integer number (30830760).

Almost surely, 2^219240920 is an apocalyptic number.

219240920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

219240920 is an abundant number, since it is smaller than the sum of its proper divisors (274051240).

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

219240920 is a wasteful number, since it uses less digits than its factorization.

219240920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481034 (or 5481030 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 219240920 is about 14806.7862819722. The cubic root of 219240920 is about 602.9859672008.

The spelling of 219240920 in words is "two hundred nineteen million, two hundred forty thousand, nine hundred twenty".