212230018 has 64 divisors (see below), whose sum is σ = 430230528. Its totient is φ = 75827520.

The previous prime is 212230013. The next prime is 212230037. The reversal of 212230018 is 810032212.

212230018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 212229977 and 212230004.

It is not an unprimeable number, because it can be changed into a prime (212230013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454221 + ... + 454687.

It is an arithmetic number, because the mean of its divisors is an integer number (6722352).

Almost surely, 2^212230018 is an apocalyptic number.

212230018 is an abundant number, since it is smaller than the sum of its proper divisors (218000510).

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

212230018 is a wasteful number, since it uses less digits than its factorization.

212230018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 212230018 is about 14568.1164877276. The cubic root of 212230018 is about 596.4887680926.

The spelling of 212230018 in words is "two hundred twelve million, two hundred thirty thousand, eighteen".