1312231323 has 32 divisors (see below), whose sum is σ = 1906248960. Its totient is φ = 798145920.

The previous prime is 1312231313. The next prime is 1312231339. The reversal of 1312231323 is 3231322131.

It is not a de Polignac number, because 1312231323 - 2¹⁸ = 1311969179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312231323.

It is not an unprimeable number, because it can be changed into a prime (1312231313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2140365 + ... + 2140977.

It is an arithmetic number, because the mean of its divisors is an integer number (59570280).

Almost surely, 2^1312231323 is an apocalyptic number.

1312231323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1312231323 is a deficient number, since it is larger than the sum of its proper divisors (594017637).

1312231323 is a wasteful number, since it uses less digits than its factorization.

1312231323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179.

The product of its digits is 648, while the sum is 21.

The square root of 1312231323 is about 36224.7335808008. The cubic root of 1312231323 is about 1094.8050702822.

Adding to 1312231323 its reverse (3231322131), we get a palindrome (4543553454).

The spelling of 1312231323 in words is "one billion, three hundred twelve million, two hundred thirty-one thousand, three hundred twenty-three".