12213615 has 8 divisors (see below), whose sum is σ = 19541808. Its totient is φ = 6513920.

The previous prime is 12213601. The next prime is 12213623. The reversal of 12213615 is 51631221.

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

It is not a de Polignac number, because 12213615 - 2⁵ = 12213583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12213591 and 12213600.

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, 407106 + ... + 407135.

It is an arithmetic number, because the mean of its divisors is an integer number (2442726).

Almost surely, 2^12213615 is an apocalyptic number.

12213615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12213615 is a deficient number, since it is larger than the sum of its proper divisors (7328193).

12213615 is an equidigital number, since it uses as much as digits as its factorization.

12213615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814249.

The product of its digits is 360, while the sum is 21.

The square root of 12213615 is about 3494.7982774403. The cubic root of 12213615 is about 230.2933559856.

Adding to 12213615 its reverse (51631221), we get a palindrome (63844836).

The spelling of 12213615 in words is "twelve million, two hundred thirteen thousand, six hundred fifteen".