161143523 has 2 divisors, whose sum is σ = 161143524. Its totient is φ = 161143522.

The previous prime is 161143513. The next prime is 161143553. The reversal of 161143523 is 325341161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161143523 - 2²⁰ = 160094947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161143492 and 161143501.

It is not a weakly prime, because it can be changed into another prime (161143513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80571761 + 80571762.

It is an arithmetic number, because the mean of its divisors is an integer number (80571762).

Almost surely, 2^161143523 is an apocalyptic number.

161143523 is a deficient number, since it is larger than the sum of its proper divisors (1).

161143523 is an equidigital number, since it uses as much as digits as its factorization.

161143523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 161143523 is about 12694.2318790859. The cubic root of 161143523 is about 544.1737872435.

Adding to 161143523 its reverse (325341161), we get a palindrome (486484684).

The spelling of 161143523 in words is "one hundred sixty-one million, one hundred forty-three thousand, five hundred twenty-three".