1531122456139 has 2 divisors, whose sum is σ = 1531122456140. Its totient is φ = 1531122456138.

The previous prime is 1531122456079. The next prime is 1531122456223. The reversal of 1531122456139 is 9316542211351.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1531122456139 - 2¹¹ = 1531122454091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1531122456095 and 1531122456104.

It is not a weakly prime, because it can be changed into another prime (1531122456839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765561228069 + 765561228070.

It is an arithmetic number, because the mean of its divisors is an integer number (765561228070).

Almost surely, 2^{1531122456139} is an apocalyptic number.

1531122456139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531122456139 is an equidigital number, since it uses as much as digits as its factorization.

1531122456139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The spelling of 1531122456139 in words is "one trillion, five hundred thirty-one billion, one hundred twenty-two million, four hundred fifty-six thousand, one hundred thirty-nine".