1228215212 has 24 divisors (see below), whose sum is σ = 2487528960. Its totient is φ = 519714000.

The previous prime is 1228215187. The next prime is 1228215217. The reversal of 1228215212 is 2125128221.

It is not an unprimeable number, because it can be changed into a prime (1228215217) 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, 275414 + ... + 279837.

It is an arithmetic number, because the mean of its divisors is an integer number (103647040).

Almost surely, 2^1228215212 is an apocalyptic number.

It is an amenable number.

1228215212 is an abundant number, since it is smaller than the sum of its proper divisors (1259313748).

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

1228215212 is a wasteful number, since it uses less digits than its factorization.

1228215212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555341 (or 555339 counting only the distinct ones).

The product of its digits is 1280, while the sum is 26.

The square root of 1228215212 is about 35045.9015007461. The cubic root of 1228215212 is about 1070.9227815577.

The spelling of 1228215212 in words is "one billion, two hundred twenty-eight million, two hundred fifteen thousand, two hundred twelve".