12208815 has 24 divisors (see below), whose sum is σ = 21565440. Its totient is φ = 6387264.

The previous prime is 12208813. The next prime is 12208817. The reversal of 12208815 is 51880221.

12208815 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12208813) and next prime (12208817).

It is not a de Polignac number, because 12208815 - 2¹ = 12208813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12208813) 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, 175 + ... + 4944.

It is an arithmetic number, because the mean of its divisors is an integer number (898560).

Almost surely, 2^12208815 is an apocalyptic number.

12208815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12208815 is a deficient number, since it is larger than the sum of its proper divisors (9356625).

12208815 is a wasteful number, since it uses less digits than its factorization.

12208815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5183 (or 5180 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 12208815 is about 3494.1114750391. Note that the first 3 decimals coincide. The cubic root of 12208815 is about 230.2631832931.

The spelling of 12208815 in words is "twelve million, two hundred eight thousand, eight hundred fifteen".