1312224231 has 4 divisors (see below), whose sum is σ = 1749632312. Its totient is φ = 874816152.

The previous prime is 1312224167. The next prime is 1312224239. The reversal of 1312224231 is 1324222131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1312224231 - 2⁶ = 1312224167 is a prime.

It is a super-2 number, since 2×1312224231² = 3443864864847082722, 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 = 1312224198 and 1312224207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312224239) 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, 218704036 + ... + 218704041.

It is an arithmetic number, because the mean of its divisors is an integer number (437408078).

Almost surely, 2^1312224231 is an apocalyptic number.

1312224231 is a deficient number, since it is larger than the sum of its proper divisors (437408081).

1312224231 is an equidigital number, since it uses as much as digits as its factorization.

1312224231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437408080.

The product of its digits is 576, while the sum is 21.

The square root of 1312224231 is about 36224.6356917499. The cubic root of 1312224231 is about 1094.8030979746.

Adding to 1312224231 its reverse (1324222131), we get a palindrome (2636446362).

The spelling of 1312224231 in words is "one billion, three hundred twelve million, two hundred twenty-four thousand, two hundred thirty-one".