2238161 has 2 divisors, whose sum is σ = 2238162. Its totient is φ = 2238160.

The previous prime is 2238127. The next prime is 2238163. The reversal of 2238161 is 1618322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2235025 + 3136 = 1495^2 + 56^2 .

It is a cyclic number.

It is not a de Polignac number, because 2238161 - 2¹⁸ = 1976017 is a prime.

Together with 2238163, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2238163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119080 + 1119081.

It is an arithmetic number, because the mean of its divisors is an integer number (1119081).

2^2238161 is an apocalyptic number.

It is an amenable number.

2238161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2238161 is an equidigital number, since it uses as much as digits as its factorization.

2238161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 2238161 is about 1496.0484617819. The cubic root of 2238161 is about 130.8068361105.

It can be divided in two parts, 22 and 38161, that added together give a palindrome (38183).

The spelling of 2238161 in words is "two million, two hundred thirty-eight thousand, one hundred sixty-one".