1312243223 has 4 divisors (see below), whose sum is σ = 1312875888. Its totient is φ = 1311610560.

The previous prime is 1312243217. The next prime is 1312243241. The reversal of 1312243223 is 3223422131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3223422131 = 277 ⋅11636903.

It is a cyclic number.

It is not a de Polignac number, because 1312243223 - 2⁶ = 1312243159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312246223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313211 + ... + 317372.

It is an arithmetic number, because the mean of its divisors is an integer number (328218972).

Almost surely, 2^1312243223 is an apocalyptic number.

1312243223 is a deficient number, since it is larger than the sum of its proper divisors (632665).

1312243223 is an equidigital number, since it uses as much as digits as its factorization.

1312243223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632664.

The product of its digits is 1728, while the sum is 23.

The square root of 1312243223 is about 36224.8978328442. The cubic root of 1312243223 is about 1094.8083796939.

Adding to 1312243223 its reverse (3223422131), we get a palindrome (4535665354).

The spelling of 1312243223 in words is "one billion, three hundred twelve million, two hundred forty-three thousand, two hundred twenty-three".