219391193912 has 64 divisors (see below), whose sum is σ = 454560076800. Its totient is φ = 98441347840.

The previous prime is 219391193909. The next prime is 219391193947.

219391193912 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×219391193912² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2107193 + ... + 2208855.

It is an arithmetic number, because the mean of its divisors is an integer number (7102501200).

Almost surely, 2^219391193912 is an apocalyptic number.

219391193912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 219391193912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227280038400).

219391193912 is an abundant number, since it is smaller than the sum of its proper divisors (235168882888).

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

219391193912 is a wasteful number, since it uses less digits than its factorization.

219391193912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101996 (or 101992 counting only the distinct ones).

The product of its digits is 236196, while the sum is 50.

The spelling of 219391193912 in words is "two hundred nineteen billion, three hundred ninety-one million, one hundred ninety-three thousand, nine hundred twelve".