133851951313 has 2 divisors, whose sum is σ = 133851951314. Its totient is φ = 133851951312.

The previous prime is 133851951287. The next prime is 133851951353. The reversal of 133851951313 is 313159158331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126147149584 + 7704801729 = 355172^2 + 87777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133851951313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133851951313.

It is not a weakly prime, because it can be changed into another prime (133851951353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66925975656 + 66925975657.

It is an arithmetic number, because the mean of its divisors is an integer number (66925975657).

Almost surely, 2^133851951313 is an apocalyptic number.

It is an amenable number.

133851951313 is a deficient number, since it is larger than the sum of its proper divisors (1).

133851951313 is an equidigital number, since it uses as much as digits as its factorization.

133851951313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 43.

The spelling of 133851951313 in words is "one hundred thirty-three billion, eight hundred fifty-one million, nine hundred fifty-one thousand, three hundred thirteen".