237225161 has 2 divisors, whose sum is σ = 237225162. Its totient is φ = 237225160.

The previous prime is 237225119. The next prime is 237225173. The reversal of 237225161 is 161522732.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208975936 + 28249225 = 14456^2 + 5315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-237225161 is a prime.

It is a super-2 number, since 2×237225161² = 112551554022951842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (237225181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118612580 + 118612581.

It is an arithmetic number, because the mean of its divisors is an integer number (118612581).

Almost surely, 2^237225161 is an apocalyptic number.

It is an amenable number.

237225161 is a deficient number, since it is larger than the sum of its proper divisors (1).

237225161 is an equidigital number, since it uses as much as digits as its factorization.

237225161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 29.

The square root of 237225161 is about 15402.1154715838. The cubic root of 237225161 is about 619.0421917455.

Adding to 237225161 its reverse (161522732), we get a palindrome (398747893).

The spelling of 237225161 in words is "two hundred thirty-seven million, two hundred twenty-five thousand, one hundred sixty-one".