142218816 has 56 divisors (see below), whose sum is σ = 382487424. Its totient is φ = 46625280.

The previous prime is 142218809. The next prime is 142218827. The reversal of 142218816 is 618812241.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5641 + ... + 17783.

Almost surely, 2^142218816 is an apocalyptic number.

142218816 is a gapful number since it is divisible by the number (16) 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 142218816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191243712).

142218816 is an abundant number, since it is smaller than the sum of its proper divisors (240268608).

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

142218816 is a wasteful number, since it uses less digits than its factorization.

142218816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12219 (or 12209 counting only the distinct ones).

The product of its digits is 6144, while the sum is 33.

The square root of 142218816 is about 11925.5530689356. The cubic root of 142218816 is about 521.9781849635.

The spelling of 142218816 in words is "one hundred forty-two million, two hundred eighteen thousand, eight hundred sixteen".