161510201 has 2 divisors, whose sum is σ = 161510202. Its totient is φ = 161510200.

The previous prime is 161510179. The next prime is 161510221. The reversal of 161510201 is 102015161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124300201 + 37210000 = 11149^2 + 6100^2 .

It is a cyclic number.

It is not a de Polignac number, because 161510201 - 2⁶ = 161510137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161510201.

It is not a weakly prime, because it can be changed into another prime (161510221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80755100 + 80755101.

It is an arithmetic number, because the mean of its divisors is an integer number (80755101).

Almost surely, 2^161510201 is an apocalyptic number.

It is an amenable number.

161510201 is a deficient number, since it is larger than the sum of its proper divisors (1).

161510201 is an equidigital number, since it uses as much as digits as its factorization.

161510201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 161510201 is about 12708.6663737782. Note that the first 3 decimals coincide. The cubic root of 161510201 is about 544.5862257879.

Adding to 161510201 its reverse (102015161), we get a palindrome (263525362).

The spelling of 161510201 in words is "one hundred sixty-one million, five hundred ten thousand, two hundred one".