219284142 has 128 divisors (see below), whose sum is σ = 575963136. Its totient is φ = 54000000.

The previous prime is 219284119. The next prime is 219284147. The reversal of 219284142 is 241482912.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219284147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 873517 + ... + 873767.

It is an arithmetic number, because the mean of its divisors is an integer number (4499712).

Almost surely, 2^219284142 is an apocalyptic number.

219284142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 219284142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287981568).

219284142 is an abundant number, since it is smaller than the sum of its proper divisors (356678994).

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

219284142 is a wasteful number, since it uses less digits than its factorization.

219284142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366.

The product of its digits is 9216, while the sum is 33.

The square root of 219284142 is about 14808.2457435039. The cubic root of 219284142 is about 603.0255895897.

The spelling of 219284142 in words is "two hundred nineteen million, two hundred eighty-four thousand, one hundred forty-two".