161051801 has 2 divisors, whose sum is σ = 161051802. Its totient is φ = 161051800.

The previous prime is 161051791. The next prime is 161051831. The reversal of 161051801 is 108150161.

It is a happy number.

161051801 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., 132802576 + 28249225 = 11524^2 + 5315^2 .

It is a cyclic number.

It is not a de Polignac number, because 161051801 - 2¹⁰ = 161050777 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (161051831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80525900 + 80525901.

It is an arithmetic number, because the mean of its divisors is an integer number (80525901).

Almost surely, 2^161051801 is an apocalyptic number.

It is an amenable number.

161051801 is a deficient number, since it is larger than the sum of its proper divisors (1).

161051801 is an equidigital number, since it uses as much as digits as its factorization.

161051801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 161051801 is about 12690.6186216433. The cubic root of 161051801 is about 544.0705207471.

The spelling of 161051801 in words is "one hundred sixty-one million, fifty-one thousand, eight hundred one".