1231352451529 has 2 divisors, whose sum is σ = 1231352451530. Its totient is φ = 1231352451528.

The previous prime is 1231352451523. The next prime is 1231352451551. The reversal of 1231352451529 is 9251542531321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1145163235129 + 86189216400 = 1070123^2 + 293580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231352451529 - 2⁷ = 1231352451401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231352451523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615676225764 + 615676225765.

It is an arithmetic number, because the mean of its divisors is an integer number (615676225765).

Almost surely, 2^{1231352451529} is an apocalyptic number.

It is an amenable number.

1231352451529 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231352451529 is an equidigital number, since it uses as much as digits as its factorization.

1231352451529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 43.

The spelling of 1231352451529 in words is "one trillion, two hundred thirty-one billion, three hundred fifty-two million, four hundred fifty-one thousand, five hundred twenty-nine".