218142512 has 40 divisors (see below), whose sum is σ = 492900000. Its totient is φ = 93487296.

The previous prime is 218142493. The next prime is 218142539. The reversal of 218142512 is 215241812.

218142512 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 14387 + ... + 25362.

It is an arithmetic number, because the mean of its divisors is an integer number (12322500).

Almost surely, 2^218142512 is an apocalyptic number.

It is an amenable number.

218142512 is an abundant number, since it is smaller than the sum of its proper divisors (274757488).

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

218142512 is an equidigital number, since it uses as much as digits as its factorization.

218142512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39778 (or 39758 counting only the distinct ones).

The product of its digits is 1280, while the sum is 26.

The square root of 218142512 is about 14769.6483370458. The cubic root of 218142512 is about 601.9772841618.

The spelling of 218142512 in words is "two hundred eighteen million, one hundred forty-two thousand, five hundred twelve".