218353012 has 6 divisors (see below), whose sum is σ = 382117778. Its totient is φ = 109176504.

The previous prime is 218352973. The next prime is 218353013. The reversal of 218353012 is 210353812.

218353012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 186158736 + 32194276 = 13644^2 + 5674^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218353013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27294123 + ... + 27294130.

Almost surely, 2^218353012 is an apocalyptic number.

It is an amenable number.

218353012 is a deficient number, since it is larger than the sum of its proper divisors (163764766).

218353012 is a wasteful number, since it uses less digits than its factorization.

218353012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54588257 (or 54588255 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 218353012 is about 14776.7727193728. The cubic root of 218353012 is about 602.1708510187.

The spelling of 218353012 in words is "two hundred eighteen million, three hundred fifty-three thousand, twelve".