1231130313 has 16 divisors (see below), whose sum is σ = 2084453760. Its totient is φ = 703502928.

The previous prime is 1231130279. The next prime is 1231130353. The reversal of 1231130313 is 3130311321.

It is a happy number.

1231130313 is a `hidden beast` number, since 12 + 311 + 30 + 313 = 666.

It is not a de Polignac number, because 1231130313 - 2¹⁸ = 1230868169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231130353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3256770 + ... + 3257147.

It is an arithmetic number, because the mean of its divisors is an integer number (130278360).

Almost surely, 2^1231130313 is an apocalyptic number.

It is an amenable number.

1231130313 is a deficient number, since it is larger than the sum of its proper divisors (853323447).

1231130313 is an equidigital number, since it uses as much as digits as its factorization.

1231130313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6513933 (or 6513927 counting only the distinct ones).

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

The square root of 1231130313 is about 35087.4666084629. The cubic root of 1231130313 is about 1071.7693708329.

Adding to 1231130313 its reverse (3130311321), we get a palindrome (4361441634).

It can be divided in two parts, 12311 and 30313, that added together give a palindrome (42624).

The spelling of 1231130313 in words is "one billion, two hundred thirty-one million, one hundred thirty thousand, three hundred thirteen".