161535443 has 2 divisors, whose sum is σ = 161535444. Its totient is φ = 161535442.

The previous prime is 161535431. The next prime is 161535497. The reversal of 161535443 is 344535161.

161535443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161535443 - 2⁴ = 161535427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (161535643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80767721 + 80767722.

It is an arithmetic number, because the mean of its divisors is an integer number (80767722).

Almost surely, 2^161535443 is an apocalyptic number.

161535443 is a deficient number, since it is larger than the sum of its proper divisors (1).

161535443 is an equidigital number, since it uses as much as digits as its factorization.

161535443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 161535443 is about 12709.6594368221. The cubic root of 161535443 is about 544.6145949546.

The spelling of 161535443 in words is "one hundred sixty-one million, five hundred thirty-five thousand, four hundred forty-three".