1313231001 has 4 divisors (see below), whose sum is σ = 1750974672. Its totient is φ = 875487332.

The previous prime is 1313230993. The next prime is 1313231033. The reversal of 1313231001 is 1001323131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1001323131 = 3 ⋅333774377.

It is a cyclic number.

It is not a de Polignac number, because 1313231001 - 2³ = 1313230993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313231081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218871831 + ... + 218871836.

It is an arithmetic number, because the mean of its divisors is an integer number (437743668).

Almost surely, 2^1313231001 is an apocalyptic number.

It is an amenable number.

1313231001 is a deficient number, since it is larger than the sum of its proper divisors (437743671).

1313231001 is an equidigital number, since it uses as much as digits as its factorization.

1313231001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437743670.

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

The square root of 1313231001 is about 36238.5292334002. The cubic root of 1313231001 is about 1095.0830128263.

Adding to 1313231001 its reverse (1001323131), we get a palindrome (2314554132).

The spelling of 1313231001 in words is "one billion, three hundred thirteen million, two hundred thirty-one thousand, one".