218030812 has 48 divisors (see below), whose sum is σ = 407959552. Its totient is φ = 101787840.

The previous prime is 218030807. The next prime is 218030819.

218030812 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218030819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548998 + ... + 549394.

Almost surely, 2^218030812 is an apocalyptic number.

It is an amenable number.

218030812 is a deficient number, since it is larger than the sum of its proper divisors (189928740).

218030812 is a wasteful number, since it uses less digits than its factorization.

218030812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 218030812 is about 14765.8664493486. The cubic root of 218030812 is about 601.8745190134.

The spelling of 218030812 in words is "two hundred eighteen million, thirty thousand, eight hundred twelve".