100018161 has 6 divisors (see below), whose sum is σ = 144470690. Its totient is φ = 66678768.

The previous prime is 100018151. The next prime is 100018189. The reversal of 100018161 is 161810001.

It can be written as a sum of positive squares in only one way, i.e., 98903025 + 1115136 = 9945^2 + 1056^2 .

It is not a de Polignac number, because 100018161 - 2⁶ = 100018097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100018151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5556556 + ... + 5556573.

Almost surely, 2^100018161 is an apocalyptic number.

It is an amenable number.

100018161 is a deficient number, since it is larger than the sum of its proper divisors (44452529).

100018161 is a wasteful number, since it uses less digits than its factorization.

100018161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11113135 (or 11113132 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 100018161 is about 10000.9080087760. The cubic root of 100018161 is about 464.1869802921.

Adding to 100018161 its reverse (161810001), we get a palindrome (261828162).

The spelling of 100018161 in words is "one hundred million, eighteen thousand, one hundred sixty-one".