219944442 has 32 divisors (see below), whose sum is σ = 457703424. Its totient is φ = 70383600.

The previous prime is 219944429. The next prime is 219944447. The reversal of 219944442 is 244449912.

It is a self number, because there is not a number n which added to its sum of digits gives 219944442.

It is not an unprimeable number, because it can be changed into a prime (219944447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18967 + ... + 28277.

It is an arithmetic number, because the mean of its divisors is an integer number (14303232).

Almost surely, 2^219944442 is an apocalyptic number.

219944442 is an abundant number, since it is smaller than the sum of its proper divisors (237758982).

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

219944442 is a wasteful number, since it uses less digits than its factorization.

219944442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9474.

The product of its digits is 82944, while the sum is 39.

The square root of 219944442 is about 14830.5239961372. The cubic root of 219944442 is about 603.6302522604.

The spelling of 219944442 in words is "two hundred nineteen million, nine hundred forty-four thousand, four hundred forty-two".