12270216 has 32 divisors (see below), whose sum is σ = 35058240. Its totient is φ = 3505728.

The previous prime is 12270197. The next prime is 12270217. The reversal of 12270216 is 61207221.

12270216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 12270192 and 12270201.

It is not an unprimeable number, because it can be changed into a prime (12270217) 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, 36351 + ... + 36686.

It is an arithmetic number, because the mean of its divisors is an integer number (1095570).

Almost surely, 2^12270216 is an apocalyptic number.

It is an amenable number.

12270216 is an abundant number, since it is smaller than the sum of its proper divisors (22788024).

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

12270216 is a wasteful number, since it uses less digits than its factorization.

12270216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73053 (or 73049 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 12270216 is about 3502.8868094759. The cubic root of 12270216 is about 230.6485538623.

Adding to 12270216 its reverse (61207221), we get a palindrome (73477437).

The spelling of 12270216 in words is "twelve million, two hundred seventy thousand, two hundred sixteen".