11231143 has 24 divisors (see below), whose sum is σ = 14511744. Its totient is φ = 8593200.

The previous prime is 11231141. The next prime is 11231159. The reversal of 11231143 is 34113211.

It is not a de Polignac number, because 11231143 - 2¹ = 11231141 is a prime.

It is a super-2 number, since 2×11231143² = 252277146172898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35958 + ... + 36268.

It is an arithmetic number, because the mean of its divisors is an integer number (604656).

Almost surely, 2^11231143 is an apocalyptic number.

11231143 is a deficient number, since it is larger than the sum of its proper divisors (3280601).

11231143 is a wasteful number, since it uses less digits than its factorization.

11231143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 396 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 11231143 is about 3351.2897517225. The cubic root of 11231143 is about 223.9449734628.

Adding to 11231143 its reverse (34113211), we get a palindrome (45344354).

The spelling of 11231143 in words is "eleven million, two hundred thirty-one thousand, one hundred forty-three".