219891042 has 48 divisors (see below), whose sum is σ = 547402752. Its totient is φ = 62490240.

The previous prime is 219891019. The next prime is 219891043. The reversal of 219891042 is 240198912.

It is a junction number, because it is equal to n+sod(n) for n = 219890988 and 219891006.

It is not an unprimeable number, because it can be changed into a prime (219891043) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19498 + ... + 28634.

It is an arithmetic number, because the mean of its divisors is an integer number (11404224).

Almost surely, 2^219891042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 219891042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273701376).

219891042 is an abundant number, since it is smaller than the sum of its proper divisors (327511710).

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

219891042 is a wasteful number, since it uses less digits than its factorization.

219891042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9343 (or 9340 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 219891042 is about 14828.7235458754. The cubic root of 219891042 is about 603.5813967946.

The spelling of 219891042 in words is "two hundred nineteen million, eight hundred ninety-one thousand, forty-two".