238161 has 16 divisors (see below), whose sum is σ = 396288. Its totient is φ = 123600.

The previous prime is 238159. The next prime is 238163. The reversal of 238161 is 161832.

It is an interprime number because it is at equal distance from previous prime (238159) and next prime (238163).

It is not a de Polignac number, because 238161 - 2¹ = 238159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is not an unprimeable number, because it can be changed into a prime (238163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285 + ... + 746.

It is an arithmetic number, because the mean of its divisors is an integer number (24768).

2²³⁸¹⁶¹ is an apocalyptic number.

238161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

238161 is a deficient number, since it is larger than the sum of its proper divisors (158127).

238161 is a wasteful number, since it uses less digits than its factorization.

238161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its digits is 288, while the sum is 21.

The square root of 238161 is about 488.0174177219. The cubic root of 238161 is about 61.9855151733.

Adding to 238161 its reverse (161832), we get a palindrome (399993).

It can be divided in two parts, 2381 and 61, that added together give a palindrome (2442).

The spelling of 238161 in words is "two hundred thirty-eight thousand, one hundred sixty-one".