12220015 has 8 divisors (see below), whose sum is σ = 15301728. Its totient is φ = 9350880.

The previous prime is 12220003. The next prime is 12220031. The reversal of 12220015 is 51002221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12220015 - 2⁹ = 12219503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12219977 and 12220004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53016 + ... + 53245.

It is an arithmetic number, because the mean of its divisors is an integer number (1912716).

Almost surely, 2^12220015 is an apocalyptic number.

12220015 is a deficient number, since it is larger than the sum of its proper divisors (3081713).

12220015 is a wasteful number, since it uses less digits than its factorization.

12220015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106289.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 12220015 is about 3495.7138040749. The cubic root of 12220015 is about 230.3335739477. Note that the first 3 decimals are identical.

Adding to 12220015 its reverse (51002221), we get a palindrome (63222236).

The spelling of 12220015 in words is "twelve million, two hundred twenty thousand, fifteen".