1312130031 has 4 divisors (see below), whose sum is σ = 1749506712. Its totient is φ = 874753352.

The previous prime is 1312129933. The next prime is 1312130033. The reversal of 1312130031 is 1300312131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312130031 - 2²¹ = 1310032879 is a prime.

It is a super-2 number, since 2×1312130031² = 3443370436504121922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312130033) 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, 218688336 + ... + 218688341.

It is an arithmetic number, because the mean of its divisors is an integer number (437376678).

Almost surely, 2^1312130031 is an apocalyptic number.

1312130031 is a deficient number, since it is larger than the sum of its proper divisors (437376681).

1312130031 is an equidigital number, since it uses as much as digits as its factorization.

1312130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437376680.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1312130031 is about 36223.3354482991. The cubic root of 1312130031 is about 1094.7768999826.

Adding to 1312130031 its reverse (1300312131), we get a palindrome (2612442162).

The spelling of 1312130031 in words is "one billion, three hundred twelve million, one hundred thirty thousand, thirty-one".