1531310131361 has 2 divisors, whose sum is σ = 1531310131362. Its totient is φ = 1531310131360.

The previous prime is 1531310131321. The next prime is 1531310131369. The reversal of 1531310131361 is 1631310131351.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1076655264400 + 454654866961 = 1037620^2 + 674281^2 .

It is an emirp because it is prime and its reverse (1631310131351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1531310131361 - 2³⁸ = 1256432224417 is a prime.

It is not a weakly prime, because it can be changed into another prime (1531310131369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765655065680 + 765655065681.

It is an arithmetic number, because the mean of its divisors is an integer number (765655065681).

Almost surely, 2^{1531310131361} is an apocalyptic number.

It is an amenable number.

1531310131361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531310131361 is an equidigital number, since it uses as much as digits as its factorization.

1531310131361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 29.

The spelling of 1531310131361 in words is "one trillion, five hundred thirty-one billion, three hundred ten million, one hundred thirty-one thousand, three hundred sixty-one".