1313507131 has 8 divisors (see below), whose sum is σ = 1324069520. Its totient is φ = 1302987168.

The previous prime is 1313507113. The next prime is 1313507149. The reversal of 1313507131 is 1317053131.

It is an interprime number because it is at equal distance from previous prime (1313507113) and next prime (1313507149).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1313507131 - 2⁹ = 1313506619 is a prime.

It is a super-2 number, since 2×1313507131² = 3450601966375702322, 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 = 1313507096 and 1313507105.

It is not an unprimeable number, because it can be changed into a prime (1313507101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53080 + ... + 73786.

It is an arithmetic number, because the mean of its divisors is an integer number (165508690).

Almost surely, 2^1313507131 is an apocalyptic number.

1313507131 is a deficient number, since it is larger than the sum of its proper divisors (10562389).

1313507131 is a wasteful number, since it uses less digits than its factorization.

1313507131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21213.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 1313507131 is about 36242.3389283860. The cubic root of 1313507131 is about 1095.1597609588.

The spelling of 1313507131 in words is "one billion, three hundred thirteen million, five hundred seven thousand, one hundred thirty-one".