2143555 has 8 divisors (see below), whose sum is σ = 2580192. Its totient is φ = 1709568.

The previous prime is 2143543. The next prime is 2143567. The reversal of 2143555 is 5553412.

It is an interprime number because it is at equal distance from previous prime (2143543) and next prime (2143567).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143555 is a prime.

It is a Duffinian number.

2143555 is a lucky 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, 2514 + ... + 3256.

It is an arithmetic number, because the mean of its divisors is an integer number (322524).

2^2143555 is an apocalyptic number.

2143555 is a deficient number, since it is larger than the sum of its proper divisors (436637).

2143555 is an equidigital number, since it uses as much as digits as its factorization.

2143555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325.

The product of its digits is 3000, while the sum is 25.

The square root of 2143555 is about 1464.0884536120. The cubic root of 2143555 is about 128.9371927494.

Adding to 2143555 its reverse (5553412), we get a palindrome (7696967).

The spelling of 2143555 in words is "two million, one hundred forty-three thousand, five hundred fifty-five".