2031578751313 has 2 divisors, whose sum is σ = 2031578751314. Its totient is φ = 2031578751312.

The previous prime is 2031578751289. The next prime is 2031578751317. The reversal of 2031578751313 is 3131578751302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1979896639744 + 51682111569 = 1407088^2 + 227337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2031578751313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2031578751317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015789375656 + 1015789375657.

It is an arithmetic number, because the mean of its divisors is an integer number (1015789375657).

Almost surely, 2^{2031578751313} is an apocalyptic number.

It is an amenable number.

2031578751313 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031578751313 is an equidigital number, since it uses as much as digits as its factorization.

2031578751313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 2031578751313 in words is "two trillion, thirty-one billion, five hundred seventy-eight million, seven hundred fifty-one thousand, three hundred thirteen".