1310533272781 has 2 divisors, whose sum is σ = 1310533272782. Its totient is φ = 1310533272780.

The previous prime is 1310533272757. The next prime is 1310533272791. The reversal of 1310533272781 is 1872723350131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1200087385225 + 110445887556 = 1095485^2 + 332334^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310533272781 - 2²⁹ = 1309996401869 is a prime.

It is a super-2 number, since 2×1310533272781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310533272791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655266636390 + 655266636391.

It is an arithmetic number, because the mean of its divisors is an integer number (655266636391).

Almost surely, 2^{1310533272781} is an apocalyptic number.

It is an amenable number.

1310533272781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310533272781 is an equidigital number, since it uses as much as digits as its factorization.

1310533272781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 1310533272781 in words is "one trillion, three hundred ten billion, five hundred thirty-three million, two hundred seventy-two thousand, seven hundred eighty-one".