201107161 has 4 divisors (see below), whose sum is σ = 212937012. Its totient is φ = 189277312.

The previous prime is 201107143. The next prime is 201107171. The reversal of 201107161 is 161701102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161701102 = 2 ⋅80850551.

It can be written as a sum of positive squares in 2 ways, for example, as 155625625 + 45481536 = 12475^2 + 6744^2 .

It is a cyclic number.

It is not a de Polignac number, because 201107161 - 2⁷ = 201107033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201107111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5914900 + ... + 5914933.

It is an arithmetic number, because the mean of its divisors is an integer number (53234253).

Almost surely, 2^201107161 is an apocalyptic number.

It is an amenable number.

201107161 is a deficient number, since it is larger than the sum of its proper divisors (11829851).

201107161 is a wasteful number, since it uses less digits than its factorization.

201107161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11829850.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 201107161 is about 14181.2256522488. The cubic root of 201107161 is about 585.8806819468.

Adding to 201107161 its reverse (161701102), we get a palindrome (362808263).

The spelling of 201107161 in words is "two hundred one million, one hundred seven thousand, one hundred sixty-one".