11143431 has 48 divisors (see below), whose sum is σ = 18712512. Its totient is φ = 6336000.

The previous prime is 11143427. The next prime is 11143463. The reversal of 11143431 is 13434111.

It is not a de Polignac number, because 11143431 - 2² = 11143427 is a prime.

It is a super-2 number, since 2×11143431² = 248352108903522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110281 + ... + 110381.

It is an arithmetic number, because the mean of its divisors is an integer number (389844).

Almost surely, 2^11143431 is an apocalyptic number.

11143431 is a deficient number, since it is larger than the sum of its proper divisors (7569081).

11143431 is a wasteful number, since it uses less digits than its factorization.

11143431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 181 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 11143431 is about 3338.1777963434. The cubic root of 11143431 is about 223.3604672361.

Adding to 11143431 its reverse (13434111), we get a palindrome (24577542).

The spelling of 11143431 in words is "eleven million, one hundred forty-three thousand, four hundred thirty-one".