1312031223 has 16 divisors (see below), whose sum is σ = 1971129600. Its totient is φ = 862366680.

The previous prime is 1312031213. The next prime is 1312031257. The reversal of 1312031223 is 3221302131.

It is not a de Polignac number, because 1312031223 - 2⁵ = 1312031191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312031196 and 1312031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312031213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340293 + ... + 344126.

It is an arithmetic number, because the mean of its divisors is an integer number (123195600).

Almost surely, 2^1312031223 is an apocalyptic number.

1312031223 is a deficient number, since it is larger than the sum of its proper divisors (659098377).

1312031223 is an equidigital number, since it uses as much as digits as its factorization.

1312031223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684499 (or 684493 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1312031223 is about 36221.9715504278. The cubic root of 1312031223 is about 1094.7494191108.

Adding to 1312031223 its reverse (3221302131), we get a palindrome (4533333354).

The spelling of 1312031223 in words is "one billion, three hundred twelve million, thirty-one thousand, two hundred twenty-three".