3131143312331 has 4 divisors (see below), whose sum is σ = 3131241959664. Its totient is φ = 3131044665000.

The previous prime is 3131143312313. The next prime is 3131143312337. The reversal of 3131143312331 is 1332133411313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131143312331 is a prime.

It is a super-2 number, since 2×3131143312331² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131143312294 and 3131143312303.

It is not an unprimeable number, because it can be changed into a prime (3131143312337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49276040 + ... + 49339541.

It is an arithmetic number, because the mean of its divisors is an integer number (782810489916).

Almost surely, 2^{3131143312331} is an apocalyptic number.

3131143312331 is a deficient number, since it is larger than the sum of its proper divisors (98647333).

3131143312331 is an equidigital number, since it uses as much as digits as its factorization.

3131143312331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98647332.

The product of its digits is 5832, while the sum is 29.

Adding to 3131143312331 its reverse (1332133411313), we get a palindrome (4463276723644).

The spelling of 3131143312331 in words is "three trillion, one hundred thirty-one billion, one hundred forty-three million, three hundred twelve thousand, three hundred thirty-one".