228137212 has 24 divisors (see below), whose sum is σ = 426069504. Its totient is φ = 106509312.

The previous prime is 228137183. The next prime is 228137213. The reversal of 228137212 is 212731822.

228137212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228137213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4573 + ... + 21844.

It is an arithmetic number, because the mean of its divisors is an integer number (17752896).

Almost surely, 2^228137212 is an apocalyptic number.

It is an amenable number.

228137212 is a deficient number, since it is larger than the sum of its proper divisors (197932292).

228137212 is a wasteful number, since it uses less digits than its factorization.

228137212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26565 (or 26563 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 228137212 is about 15104.2117305075. The cubic root of 228137212 is about 611.0340001241.

It can be divided in two parts, 2281 and 37212, that added together give a palindrome (39493).

The spelling of 228137212 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, two hundred twelve".