212230404 has 36 divisors (see below), whose sum is σ = 537041596. Its totient is φ = 70668288.

The previous prime is 212230373. The next prime is 212230423. The reversal of 212230404 is 404032212.

It can be written as a sum of positive squares in 2 ways, for example, as 67076100 + 145154304 = 8190^2 + 12048^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38952 + ... + 44064.

Almost surely, 2^212230404 is an apocalyptic number.

It is an amenable number.

212230404 is an abundant number, since it is smaller than the sum of its proper divisors (324811192).

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

212230404 is a wasteful number, since it uses less digits than its factorization.

212230404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6276 (or 6271 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 212230404 is about 14568.1297358309. The cubic root of 212230404 is about 596.4891297199.

Adding to 212230404 its reverse (404032212), we get a palindrome (616262616).

The spelling of 212230404 in words is "two hundred twelve million, two hundred thirty thousand, four hundred four".