2321216 has 14 divisors (see below), whose sum is σ = 4606290. Its totient is φ = 1160576.

The previous prime is 2321213. The next prime is 2321219. The reversal of 2321216 is 6121232.

It is an interprime number because it is at equal distance from previous prime (2321213) and next prime (2321219).

It can be written as a sum of positive squares in only one way, i.e., 2310400 + 10816 = 1520^2 + 104^2 .

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2321194 and 2321203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18071 + ... + 18198.

2^2321216 is an apocalyptic number.

It is an amenable number.

2321216 is a deficient number, since it is larger than the sum of its proper divisors (2285074).

2321216 is an equidigital number, since it uses as much as digits as its factorization.

2321216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36281 (or 36271 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 2321216 is about 1523.5537404371. The cubic root of 2321216 is about 132.4052437508.

Adding to 2321216 its reverse (6121232), we get a palindrome (8442448).

The spelling of 2321216 in words is "two million, three hundred twenty-one thousand, two hundred sixteen".