1243231031 has 4 divisors (see below), whose sum is σ = 1420835472. Its totient is φ = 1065626592.

The previous prime is 1243231027. The next prime is 1243231051. The reversal of 1243231031 is 1301323421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1301323421 = 139 ⋅9362039.

It is a cyclic number.

It is not a de Polignac number, because 1243231031 - 2² = 1243231027 is a prime.

It is a super-2 number, since 2×1243231031² = 3091246792882645922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1243230994 and 1243231012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243231051) 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, 88802210 + ... + 88802223.

It is an arithmetic number, because the mean of its divisors is an integer number (355208868).

Almost surely, 2^1243231031 is an apocalyptic number.

1243231031 is a deficient number, since it is larger than the sum of its proper divisors (177604441).

1243231031 is an equidigital number, since it uses as much as digits as its factorization.

1243231031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177604440.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1243231031 is about 35259.4814340767. The cubic root of 1243231031 is about 1075.2693843732.

Adding to 1243231031 its reverse (1301323421), we get a palindrome (2544554452).

The spelling of 1243231031 in words is "one billion, two hundred forty-three million, two hundred thirty-one thousand, thirty-one".