1313939128331 has 4 divisors (see below), whose sum is σ = 1313941424064. Its totient is φ = 1313936832600.

The previous prime is 1313939128319. The next prime is 1313939128343. The reversal of 1313939128331 is 1338219393131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (1313939128319) and next prime (1313939128343).

It is a cyclic number.

It is not a de Polignac number, because 1313939128331 - 2⁶ = 1313939128267 is a prime.

It is a super-2 number, since 2×1313939128331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313939128231) 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, 483221 + ... + 1691561.

It is an arithmetic number, because the mean of its divisors is an integer number (328485356016).

Almost surely, 2^{1313939128331} is an apocalyptic number.

1313939128331 is a deficient number, since it is larger than the sum of its proper divisors (2295733).

1313939128331 is a wasteful number, since it uses less digits than its factorization.

1313939128331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295732.

The product of its digits is 314928, while the sum is 47.

The spelling of 1313939128331 in words is "one trillion, three hundred thirteen billion, nine hundred thirty-nine million, one hundred twenty-eight thousand, three hundred thirty-one".