1231052243 has 4 divisors (see below), whose sum is σ = 1232732448. Its totient is φ = 1229372040.

The previous prime is 1231052239. The next prime is 1231052267. The reversal of 1231052243 is 3422501321.

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 1231052243 - 2² = 1231052239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231052143) 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, 839003 + ... + 840468.

It is an arithmetic number, because the mean of its divisors is an integer number (308183112).

Almost surely, 2^1231052243 is an apocalyptic number.

1231052243 is a deficient number, since it is larger than the sum of its proper divisors (1680205).

1231052243 is an equidigital number, since it uses as much as digits as its factorization.

1231052243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680204.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1231052243 is about 35086.3540853136. The cubic root of 1231052243 is about 1071.7467155536.

Adding to 1231052243 its reverse (3422501321), we get a palindrome (4653553564).

The spelling of 1231052243 in words is "one billion, two hundred thirty-one million, fifty-two thousand, two hundred forty-three".