16431232530173 has 2 divisors, whose sum is σ = 16431232530174. Its totient is φ = 16431232530172.

The previous prime is 16431232530131. The next prime is 16431232530199. The reversal of 16431232530173 is 37103523213461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14715831998884 + 1715400531289 = 3836122^2 + 1309733^2 .

It is a cyclic number.

It is not a de Polignac number, because 16431232530173 - 2¹⁸ = 16431232268029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16431232530173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16431232530113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8215616265086 + 8215616265087.

It is an arithmetic number, because the mean of its divisors is an integer number (8215616265087).

Almost surely, 2^{16431232530173} is an apocalyptic number.

It is an amenable number.

16431232530173 is a deficient number, since it is larger than the sum of its proper divisors (1).

16431232530173 is an equidigital number, since it uses as much as digits as its factorization.

16431232530173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 16431232530173 in words is "sixteen trillion, four hundred thirty-one billion, two hundred thirty-two million, five hundred thirty thousand, one hundred seventy-three".