161632241 has 2 divisors, whose sum is σ = 161632242. Its totient is φ = 161632240.

The previous prime is 161632213. The next prime is 161632279. The reversal of 161632241 is 142236161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137827600 + 23804641 = 11740^2 + 4879^2 .

It is a cyclic number.

It is not a de Polignac number, because 161632241 - 2²² = 157437937 is a prime.

It is a super-2 number, since 2×161632241² = 52249962661364162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 161632241.

It is not a weakly prime, because it can be changed into another prime (161638241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80816120 + 80816121.

It is an arithmetic number, because the mean of its divisors is an integer number (80816121).

Almost surely, 2^161632241 is an apocalyptic number.

It is an amenable number.

161632241 is a deficient number, since it is larger than the sum of its proper divisors (1).

161632241 is an equidigital number, since it uses as much as digits as its factorization.

161632241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 161632241 is about 12713.4669150472. The cubic root of 161632241 is about 544.7233576219.

The spelling of 161632241 in words is "one hundred sixty-one million, six hundred thirty-two thousand, two hundred forty-one".