11203143 has 16 divisors (see below), whose sum is σ = 17189376. Its totient is φ = 6357600.

The previous prime is 11203123. The next prime is 11203151. The reversal of 11203143 is 34130211.

It is not a de Polignac number, because 11203143 - 2⁵ = 11203111 is a prime.

It is a super-3 number, since 3×11203143³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1405 + ... + 4937.

It is an arithmetic number, because the mean of its divisors is an integer number (1074336).

Almost surely, 2^11203143 is an apocalyptic number.

11203143 is a deficient number, since it is larger than the sum of its proper divisors (5986233).

11203143 is a wasteful number, since it uses less digits than its factorization.

11203143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 11203143 is about 3347.1096486372. The cubic root of 11203143 is about 223.7587152645.

Adding to 11203143 its reverse (34130211), we get a palindrome (45333354).

The spelling of 11203143 in words is "eleven million, two hundred three thousand, one hundred forty-three".