1243230031 has 6 divisors (see below), whose sum is σ = 1259284560. Its totient is φ = 1227183516.

The previous prime is 1243230019. The next prime is 1243230049. The reversal of 1243230031 is 1300323421.

It is not a de Polignac number, because 1243230031 - 2⁷ = 1243229903 is a prime.

It is a super-2 number, since 2×1243230031² = 3091241819960521922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243229990 and 1243230008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243230011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 311410 + ... + 315376.

It is an arithmetic number, because the mean of its divisors is an integer number (209880760).

Almost surely, 2^1243230031 is an apocalyptic number.

1243230031 is a deficient number, since it is larger than the sum of its proper divisors (16054529).

1243230031 is an frugal number, since it uses more digits than its factorization.

1243230031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8013 (or 4046 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1243230031 is about 35259.4672534909. The cubic root of 1243230031 is about 1075.2690960734.

Adding to 1243230031 its reverse (1300323421), we get a palindrome (2543553452).

The spelling of 1243230031 in words is "one billion, two hundred forty-three million, two hundred thirty thousand, thirty-one".