1312113231 has 36 divisors (see below), whose sum is σ = 2243508904. Its totient is φ = 734041440.

The previous prime is 1312113217. The next prime is 1312113251. The reversal of 1312113231 is 1323112131.

1312113231 is a `hidden beast` number, since 131 + 211 + 323 + 1 = 666.

It is not a de Polignac number, because 1312113231 - 2⁹ = 1312112719 is a prime.

It is a super-2 number, since 2×1312113231² = 3443282261930518722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312113251) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32185 + ... + 60498.

Almost surely, 2^1312113231 is an apocalyptic number.

1312113231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1312113231 is a deficient number, since it is larger than the sum of its proper divisors (931395673).

1312113231 is a wasteful number, since it uses less digits than its factorization.

1312113231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92724 (or 92710 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1312113231 is about 36223.1035528432. The cubic root of 1312113231 is about 1094.7722275975.

Adding to 1312113231 its reverse (1323112131), we get a palindrome (2635225362).

The spelling of 1312113231 in words is "one billion, three hundred twelve million, one hundred thirteen thousand, two hundred thirty-one".