1131223443 has 8 divisors (see below), whose sum is σ = 1723769088. Its totient is φ = 646413384.

The previous prime is 1131223433. The next prime is 1131223453. The reversal of 1131223443 is 3443221311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1131223433) and next prime (1131223453).

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

It is not a de Polignac number, because 1131223443 - 2⁴ = 1131223427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131223433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26933871 + ... + 26933912.

It is an arithmetic number, because the mean of its divisors is an integer number (215471136).

Almost surely, 2^1131223443 is an apocalyptic number.

1131223443 is a deficient number, since it is larger than the sum of its proper divisors (592545645).

1131223443 is an equidigital number, since it uses as much as digits as its factorization.

1131223443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53867793.

The product of its digits is 1728, while the sum is 24.

The square root of 1131223443 is about 33633.6653221144. The cubic root of 1131223443 is about 1041.9562056471.

Adding to 1131223443 its reverse (3443221311), we get a palindrome (4574444754).

The spelling of 1131223443 in words is "one billion, one hundred thirty-one million, two hundred twenty-three thousand, four hundred forty-three".