218961234 has 12 divisors (see below), whose sum is σ = 474416046. Its totient is φ = 72987072.

The previous prime is 218961229. The next prime is 218961251. The reversal of 218961234 is 432169812.

218961234 is a `hidden beast` number, since 2 + 1 + 8 + 9 + 612 + 34 = 666.

It can be written as a sum of positive squares in only one way, i.e., 162486009 + 56475225 = 12747^2 + 7515^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6082239 + ... + 6082274.

Almost surely, 2^218961234 is an apocalyptic number.

218961234 is an abundant number, since it is smaller than the sum of its proper divisors (255454812).

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

218961234 is a wasteful number, since it uses less digits than its factorization.

218961234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12164521 (or 12164518 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 218961234 is about 14797.3387472207. The cubic root of 218961234 is about 602.7294480279.

The spelling of 218961234 in words is "two hundred eighteen million, nine hundred sixty-one thousand, two hundred thirty-four".