20150161 has 2 divisors, whose sum is σ = 20150162. Its totient is φ = 20150160.

The previous prime is 20150153. The next prime is 20150177. The reversal of 20150161 is 16105102.

It is a happy number.

It is an a-pointer prime, because the next prime (20150177) can be obtained adding 20150161 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17766225 + 2383936 = 4215^2 + 1544^2 .

It is a cyclic number.

It is not a de Polignac number, because 20150161 - 2³ = 20150153 is a prime.

It is not a weakly prime, because it can be changed into another prime (20150111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075080 + 10075081.

It is an arithmetic number, because the mean of its divisors is an integer number (10075081).

Almost surely, 2^20150161 is an apocalyptic number.

It is an amenable number.

20150161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20150161 is an equidigital number, since it uses as much as digits as its factorization.

20150161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 20150161 is about 4488.8930706801. The cubic root of 20150161 is about 272.1194013338.

Adding to 20150161 its reverse (16105102), we get a palindrome (36255263).

The spelling of 20150161 in words is "twenty million, one hundred fifty thousand, one hundred sixty-one".