12220215 has 32 divisors (see below), whose sum is σ = 22503936. Its totient is φ = 5546880.

The previous prime is 12220193. The next prime is 12220217. The reversal of 12220215 is 51202221.

It is not a de Polignac number, because 12220215 - 2⁵ = 12220183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 12220194 and 12220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18684 + ... + 19326.

It is an arithmetic number, because the mean of its divisors is an integer number (703248).

Almost surely, 2^12220215 is an apocalyptic number.

12220215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12220215 is a deficient number, since it is larger than the sum of its proper divisors (10283721).

12220215 is a wasteful number, since it uses less digits than its factorization.

12220215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12220215 is about 3495.7424104187. The cubic root of 12220215 is about 230.3348305327.

Adding to 12220215 its reverse (51202221), we get a palindrome (63422436).

The spelling of 12220215 in words is "twelve million, two hundred twenty thousand, two hundred fifteen".