161524817 has 2 divisors, whose sum is σ = 161524818. Its totient is φ = 161524816.

The previous prime is 161524777. The next prime is 161524829. The reversal of 161524817 is 718425161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156525121 + 4999696 = 12511^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 161524817 - 2²⁰ = 160476241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161524877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80762408 + 80762409.

It is an arithmetic number, because the mean of its divisors is an integer number (80762409).

Almost surely, 2^161524817 is an apocalyptic number.

It is an amenable number.

161524817 is a deficient number, since it is larger than the sum of its proper divisors (1).

161524817 is an equidigital number, since it uses as much as digits as its factorization.

161524817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 161524817 is about 12709.2414014370. The cubic root of 161524817 is about 544.6026528869.

Adding to 161524817 its reverse (718425161), we get a palindrome (879949978).

The spelling of 161524817 in words is "one hundred sixty-one million, five hundred twenty-four thousand, eight hundred seventeen".