313133132981 has 2 divisors, whose sum is σ = 313133132982. Its totient is φ = 313133132980.

The previous prime is 313133132957. The next prime is 313133133011. The reversal of 313133132981 is 189231331313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300687722500 + 12445410481 = 548350^2 + 111559^2 .

It is a cyclic number.

It is not a de Polignac number, because 313133132981 - 2¹⁸ = 313132870837 is a prime.

It is a super-2 number, since 2×313133132981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313133132951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156566566490 + 156566566491.

It is an arithmetic number, because the mean of its divisors is an integer number (156566566491).

Almost surely, 2^313133132981 is an apocalyptic number.

It is an amenable number.

313133132981 is a deficient number, since it is larger than the sum of its proper divisors (1).

313133132981 is an equidigital number, since it uses as much as digits as its factorization.

313133132981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 38.

The spelling of 313133132981 in words is "three hundred thirteen billion, one hundred thirty-three million, one hundred thirty-two thousand, nine hundred eighty-one".