2143503 has 12 divisors (see below), whose sum is σ = 3211208. Its totient is φ = 1428840.

The previous prime is 2143501. The next prime is 2143517. The reversal of 2143503 is 3053412.

It is not a de Polignac number, because 2143503 - 2¹ = 2143501 is a prime.

It is a super-2 number, since 2×2143503² = 9189210222018, which contains 22 as substring.

It is a Duffinian number.

2143503 is a lucky number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4168 + ... + 4653.

2^2143503 is an apocalyptic number.

2143503 is a deficient number, since it is larger than the sum of its proper divisors (1067705).

2143503 is an frugal number, since it uses more digits than its factorization.

2143503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8836 (or 8824 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 2143503 is about 1464.0706950144. The cubic root of 2143503 is about 128.9361501219.

Subtracting from 2143503 its sum of digits (18), we obtain a triangular number (2143485 = T₂₀₇₀).

Adding to 2143503 its reverse (3053412), we get a palindrome (5196915).

Subtracting 2143503 from its reverse (3053412), we obtain a palindrome (909909).

The spelling of 2143503 in words is "two million, one hundred forty-three thousand, five hundred three".