1231344331 has 8 divisors (see below), whose sum is σ = 1410798560. Its totient is φ = 1052777088.

The previous prime is 1231344329. The next prime is 1231344341. The reversal of 1231344331 is 1334431321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231344331 - 2¹ = 1231344329 is a prime.

It is a super-2 number, since 2×1231344331² = 3032417722971675122, 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 = 1231344296 and 1231344305.

It is not an unprimeable number, because it can be changed into a prime (1231344341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218766 + ... + 224323.

It is an arithmetic number, because the mean of its divisors is an integer number (176349820).

Almost surely, 2^1231344331 is an apocalyptic number.

1231344331 is a deficient number, since it is larger than the sum of its proper divisors (179454229).

1231344331 is an equidigital number, since it uses as much as digits as its factorization.

1231344331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443493.

The product of its digits is 2592, while the sum is 25.

The square root of 1231344331 is about 35090.5162543956. The cubic root of 1231344331 is about 1071.8314722055.

Adding to 1231344331 its reverse (1334431321), we get a palindrome (2565775652).

It can be divided in two parts, 12313 and 44331, that added together give a square (56644 = 238²).

The spelling of 1231344331 in words is "one billion, two hundred thirty-one million, three hundred forty-four thousand, three hundred thirty-one".