228355212 has 36 divisors (see below), whose sum is σ = 536950568. Its totient is φ = 75532800.

The previous prime is 228355181. The next prime is 228355213. The reversal of 228355212 is 212553822.

228355212 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×228355212² = 104292205695129888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228355212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228355213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 812512 + ... + 812792.

Almost surely, 2^228355212 is an apocalyptic number.

It is an amenable number.

228355212 is an abundant number, since it is smaller than the sum of its proper divisors (308595356).

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

228355212 is a wasteful number, since it uses less digits than its factorization.

228355212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 527 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 228355212 is about 15111.4265375576. The cubic root of 228355212 is about 611.2285657900.

The spelling of 228355212 in words is "two hundred twenty-eight million, three hundred fifty-five thousand, two hundred twelve".