1313440031 has 4 divisors (see below), whose sum is σ = 1343985192. Its totient is φ = 1282894872.

The previous prime is 1313440027. The next prime is 1313440049. The reversal of 1313440031 is 1300443131.

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 1313440031 - 2² = 1313440027 is a prime.

It is a super-2 number, since 2×1313440031² = 3450249430066561922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313439985 and 1313440012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313440021) 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, 15272516 + ... + 15272601.

It is an arithmetic number, because the mean of its divisors is an integer number (335996298).

Almost surely, 2^1313440031 is an apocalyptic number.

1313440031 is a deficient number, since it is larger than the sum of its proper divisors (30545161).

1313440031 is an equidigital number, since it uses as much as digits as its factorization.

1313440031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30545160.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1313440031 is about 36241.4132036818. The cubic root of 1313440031 is about 1095.1411120381.

Adding to 1313440031 its reverse (1300443131), we get a palindrome (2613883162).

The spelling of 1313440031 in words is "one billion, three hundred thirteen million, four hundred forty thousand, thirty-one".