12213015 has 16 divisors (see below), whose sum is σ = 19644768. Its totient is φ = 6478976.

The previous prime is 12213013. The next prime is 12213017. The reversal of 12213015 is 51031221.

12213015 = T₂₄₉ + T₂₅₀ + ... + T₄₄₅.

It is an interprime number because it is at equal distance from previous prime (12213013) and next prime (12213017).

It is a cyclic number.

It is not a de Polignac number, because 12213015 - 2¹ = 12213013 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 = 12212985 and 12213003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 889 + ... + 5021.

It is an arithmetic number, because the mean of its divisors is an integer number (1227798).

Almost surely, 2^12213015 is an apocalyptic number.

12213015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12213015 is a deficient number, since it is larger than the sum of its proper divisors (7431753).

12213015 is a wasteful number, since it uses less digits than its factorization.

12213015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 12213015 is about 3494.7124345216. The cubic root of 12213015 is about 230.2895848314.

Adding to 12213015 its reverse (51031221), we get a palindrome (63244236).

The spelling of 12213015 in words is "twelve million, two hundred thirteen thousand, fifteen".