103212228 has 72 divisors (see below), whose sum is σ = 281649312. Its totient is φ = 29331456.

The previous prime is 103212223. The next prime is 103212229. The reversal of 103212228 is 822212301.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (103212223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150775 + ... + 151457.

It is an arithmetic number, because the mean of its divisors is an integer number (3911796).

Almost surely, 2^103212228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 103212228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140824656).

103212228 is an abundant number, since it is smaller than the sum of its proper divisors (178437084).

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

103212228 is a wasteful number, since it uses less digits than its factorization.

103212228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 103212228 is about 10159.3419078206. The cubic root of 103212228 is about 469.0765450174.

Adding to 103212228 its reverse (822212301), we get a palindrome (925424529).

The spelling of 103212228 in words is "one hundred three million, two hundred twelve thousand, two hundred twenty-eight".