1131442223 has 4 divisors (see below), whose sum is σ = 1131606840. Its totient is φ = 1131277608.

The previous prime is 1131442217. The next prime is 1131442237. The reversal of 1131442223 is 3222441311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131442223 - 2¹⁴ = 1131425839 is a prime.

It is a super-3 number, since 3×1131442223³ (a number of 28 digits) contains 333 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 (1131442253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71528 + ... + 85901.

It is an arithmetic number, because the mean of its divisors is an integer number (282901710).

Almost surely, 2^1131442223 is an apocalyptic number.

1131442223 is a deficient number, since it is larger than the sum of its proper divisors (164617).

1131442223 is an equidigital number, since it uses as much as digits as its factorization.

1131442223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164616.

The product of its digits is 1152, while the sum is 23.

The square root of 1131442223 is about 33636.9175609181. The cubic root of 1131442223 is about 1042.0233731861.

Adding to 1131442223 its reverse (3222441311), we get a palindrome (4353883534).

The spelling of 1131442223 in words is "one billion, one hundred thirty-one million, four hundred forty-two thousand, two hundred twenty-three".