236161 has 4 divisors (see below), whose sum is σ = 238000. Its totient is φ = 234324.

The previous prime is 236153. The next prime is 236167. The reversal of 236161 is 161632.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 236161 - 2³ = 236153 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (236167) 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, 711 + ... + 988.

It is an arithmetic number, because the mean of its divisors is an integer number (59500).

2²³⁶¹⁶¹ is an apocalyptic number.

It is an amenable number.

236161 is a deficient number, since it is larger than the sum of its proper divisors (1839).

236161 is a wasteful number, since it uses less digits than its factorization.

236161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838.

The product of its digits is 216, while the sum is 19.

The square root of 236161 is about 485.9639904355. The cubic root of 236161 is about 61.8115156779.

Adding to 236161 its reverse (161632), we get a palindrome (397793).

Subtracting from 236161 its reverse (161632), we obtain a square (74529 = 273²).

It can be divided in two parts, 2 and 36161, that added together give a palindrome (36163).

The spelling of 236161 in words is "two hundred thirty-six thousand, one hundred sixty-one".