218471042 has 16 divisors (see below), whose sum is σ = 340307352. Its totient is φ = 105108480.

The previous prime is 218471027. The next prime is 218471069. The reversal of 218471042 is 240174812.

It can be written as a sum of positive squares in 4 ways, for example, as 203034001 + 15437041 = 14249^2 + 3929^2 .

It is a junction number, because it is equal to n+sod(n) for n = 218470996 and 218471014.

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 7 ways as a sum of consecutive naturals, for example, 12263 + ... + 24234.

Almost surely, 2^218471042 is an apocalyptic number.

218471042 is a deficient number, since it is larger than the sum of its proper divisors (121836310).

218471042 is a wasteful number, since it uses less digits than its factorization.

218471042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36613.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 218471042 is about 14780.7659476767. The cubic root of 218471042 is about 602.2793319634.

It can be divided in two parts, 2 and 18471042, that multiplied together give a square (36942084 = 6078²).

The spelling of 218471042 in words is "two hundred eighteen million, four hundred seventy-one thousand, forty-two".