2231215 has 16 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 1528800.

The previous prime is 2231209. The next prime is 2231219. The reversal of 2231215 is 5121322.

2231215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2231215 - 2⁷ = 2231087 is a prime.

It is a super-3 number, since 3×2231215³ = 33323109294716590125, which contains 333 as substring.

2231215 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1065 + ... + 2365.

It is an arithmetic number, because the mean of its divisors is an integer number (195300).

2^2231215 is an apocalyptic number.

2231215 is a deficient number, since it is larger than the sum of its proper divisors (893585).

2231215 is an equidigital number, since it uses as much as digits as its factorization.

2231215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327 (or 1313 counting only the distinct ones).

The product of its digits is 120, while the sum is 16.

The square root of 2231215 is about 1493.7252089993. The cubic root of 2231215 is about 130.6713787983.

Adding to 2231215 its reverse (5121322), we get a palindrome (7352537).

The spelling of 2231215 in words is "two million, two hundred thirty-one thousand, two hundred fifteen".