161330201 has 2 divisors, whose sum is σ = 161330202. Its totient is φ = 161330200.

The previous prime is 161330189. The next prime is 161330233. The reversal of 161330201 is 102033161.

161330201 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 can be written as a sum of positive squares in only one way, i.e., 113443801 + 47886400 = 10651^2 + 6920^2 .

It is a cyclic number.

It is not a de Polignac number, because 161330201 - 2²² = 157135897 is a prime.

It is a super-3 number, since 3×161330201³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161330201.

It is not a weakly prime, because it can be changed into another prime (161330261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80665100 + 80665101.

It is an arithmetic number, because the mean of its divisors is an integer number (80665101).

Almost surely, 2^161330201 is an apocalyptic number.

It is an amenable number.

161330201 is a deficient number, since it is larger than the sum of its proper divisors (1).

161330201 is an equidigital number, since it uses as much as digits as its factorization.

161330201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 161330201 is about 12701.5826179260. The cubic root of 161330201 is about 544.3838403071.

Adding to 161330201 its reverse (102033161), we get a palindrome (263363362).

The spelling of 161330201 in words is "one hundred sixty-one million, three hundred thirty thousand, two hundred one".