50000161 has 2 divisors, whose sum is σ = 50000162. Its totient is φ = 50000160.

The previous prime is 50000141. The next prime is 50000201. The reversal of 50000161 is 16100005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44622400 + 5377761 = 6680^2 + 2319^2 .

It is a cyclic number.

It is not a de Polignac number, because 50000161 - 2¹⁷ = 49869089 is a prime.

It is a super-2 number, since 2×50000161² = 5000032200051842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50000101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25000080 + 25000081.

It is an arithmetic number, because the mean of its divisors is an integer number (25000081).

Almost surely, 2^50000161 is an apocalyptic number.

It is an amenable number.

50000161 is a deficient number, since it is larger than the sum of its proper divisors (1).

50000161 is an equidigital number, since it uses as much as digits as its factorization.

50000161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 50000161 is about 7071.0791962755. The cubic root of 50000161 is about 368.4035452830.

Adding to 50000161 its reverse (16100005), we get a palindrome (66100166).

The spelling of 50000161 in words is "fifty million, one hundred sixty-one", and thus it is an aban number.