1243234331 has 4 divisors (see below), whose sum is σ = 1243543200. Its totient is φ = 1242925464.

The previous prime is 1243234319. The next prime is 1243234357. The reversal of 1243234331 is 1334323421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243234331 is a prime.

It is a super-2 number, since 2×1243234331² = 3091263203554035122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1243234331.

It is not an unprimeable number, because it can be changed into a prime (1243234381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148316 + ... + 156473.

It is an arithmetic number, because the mean of its divisors is an integer number (310885800).

Almost surely, 2^1243234331 is an apocalyptic number.

1243234331 is a deficient number, since it is larger than the sum of its proper divisors (308869).

1243234331 is an equidigital number, since it uses as much as digits as its factorization.

1243234331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308868.

The product of its digits is 5184, while the sum is 26.

The square root of 1243234331 is about 35259.5282299693. The cubic root of 1243234331 is about 1075.2703357614.

Adding to 1243234331 its reverse (1334323421), we get a palindrome (2577557752).

The spelling of 1243234331 in words is "one billion, two hundred forty-three million, two hundred thirty-four thousand, three hundred thirty-one".