1312310331 has 24 divisors (see below), whose sum is σ = 1917893120. Its totient is φ = 864601776.

The previous prime is 1312310323. The next prime is 1312310353. The reversal of 1312310331 is 1330132131.

It is a happy number.

1312310331 is a `hidden beast` number, since 13 + 12 + 310 + 331 = 666.

It is not a de Polignac number, because 1312310331 - 2³ = 1312310323 is a prime.

It is a super-2 number, since 2×1312310331² = 3444316809698659122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312310371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 572670 + ... + 574956.

Almost surely, 2^1312310331 is an apocalyptic number.

1312310331 is a deficient number, since it is larger than the sum of its proper divisors (605582789).

1312310331 is a wasteful number, since it uses less digits than its factorization.

1312310331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015 (or 3012 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1312310331 is about 36225.8240900052. The cubic root of 1312310331 is about 1094.8270421763.

Adding to 1312310331 its reverse (1330132131), we get a palindrome (2642442462).

The spelling of 1312310331 in words is "one billion, three hundred twelve million, three hundred ten thousand, three hundred thirty-one".