2213987 has 4 divisors (see below), whose sum is σ = 2217336. Its totient is φ = 2210640.

The previous prime is 2213983. The next prime is 2214001. The reversal of 2213987 is 7893122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2213987 - 2² = 2213983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2213983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314 + ... + 2127.

It is an arithmetic number, because the mean of its divisors is an integer number (554334).

2^2213987 is an apocalyptic number.

2213987 is a deficient number, since it is larger than the sum of its proper divisors (3349).

2213987 is an equidigital number, since it uses as much as digits as its factorization.

2213987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3348.

The product of its digits is 6048, while the sum is 32.

The square root of 2213987 is about 1487.9472436884. The cubic root of 2213987 is about 130.3341894765.

The spelling of 2213987 in words is "two million, two hundred thirteen thousand, nine hundred eighty-seven".