1234313231 has 4 divisors (see below), whose sum is σ = 1234390872. Its totient is φ = 1234235592.

The previous prime is 1234313219. The next prime is 1234313281. The reversal of 1234313231 is 1323134321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1234313231 - 2³⁰ = 160571407 is a prime.

It is a super-2 number, since 2×1234313231² = 3047058304443318722, 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 = 1234313197 and 1234313206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234313281) 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, 5360 + ... + 49973.

It is an arithmetic number, because the mean of its divisors is an integer number (308597718).

Almost surely, 2^1234313231 is an apocalyptic number.

1234313231 is a deficient number, since it is larger than the sum of its proper divisors (77641).

1234313231 is an equidigital number, since it uses as much as digits as its factorization.

1234313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77640.

The product of its digits is 1296, while the sum is 23.

The square root of 1234313231 is about 35132.7942384320. The cubic root of 1234313231 is about 1072.6922134000.

Adding to 1234313231 its reverse (1323134321), we get a palindrome (2557447552).

The spelling of 1234313231 in words is "one billion, two hundred thirty-four million, three hundred thirteen thousand, two hundred thirty-one".