218145235 has 32 divisors (see below), whose sum is σ = 333983232. Its totient is φ = 132814080.

The previous prime is 218145209. The next prime is 218145259. The reversal of 218145235 is 532541812.

It is not a de Polignac number, because 218145235 - 2⁷ = 218145107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218145197 and 218145206.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 9967 + ... + 23143.

It is an arithmetic number, because the mean of its divisors is an integer number (10436976).

Almost surely, 2^218145235 is an apocalyptic number.

218145235 is a deficient number, since it is larger than the sum of its proper divisors (115837997).

218145235 is a wasteful number, since it uses less digits than its factorization.

218145235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13243.

The product of its digits is 9600, while the sum is 31.

The square root of 218145235 is about 14769.7405190477. The cubic root of 218145235 is about 601.9797889117.

The spelling of 218145235 in words is "two hundred eighteen million, one hundred forty-five thousand, two hundred thirty-five".