431166521025013 has 2 divisors, whose sum is σ = 431166521025014. Its totient is φ = 431166521025012.

The previous prime is 431166521024971. The next prime is 431166521025083. The reversal of 431166521025013 is 310520125661134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266666221886724 + 164500299138289 = 16329918^2 + 12825767^2 .

It is a cyclic number.

It is not a de Polignac number, because 431166521025013 - 2²¹ = 431166518927861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431166521025083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215583260512506 + 215583260512507.

It is an arithmetic number, because the mean of its divisors is an integer number (215583260512507).

Almost surely, 2^{431166521025013} is an apocalyptic number.

It is an amenable number.

431166521025013 is a deficient number, since it is larger than the sum of its proper divisors (1).

431166521025013 is an equidigital number, since it uses as much as digits as its factorization.

431166521025013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

Adding to 431166521025013 its reverse (310520125661134), we get a palindrome (741686646686147).

The spelling of 431166521025013 in words is "four hundred thirty-one trillion, one hundred sixty-six billion, five hundred twenty-one million, twenty-five thousand, thirteen".