166225237 has 2 divisors, whose sum is σ = 166225238. Its totient is φ = 166225236.

The previous prime is 166225219. The next prime is 166225247. The reversal of 166225237 is 732522661.

166225237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121682961 + 44542276 = 11031^2 + 6674^2 .

It is a cyclic number.

It is not a de Polignac number, because 166225237 - 2²⁷ = 32007509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166225247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83112618 + 83112619.

It is an arithmetic number, because the mean of its divisors is an integer number (83112619).

Almost surely, 2^166225237 is an apocalyptic number.

It is an amenable number.

166225237 is a deficient number, since it is larger than the sum of its proper divisors (1).

166225237 is an equidigital number, since it uses as much as digits as its factorization.

166225237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 166225237 is about 12892.8366545148. The cubic root of 166225237 is about 549.8349223592.

Adding to 166225237 its reverse (732522661), we get a palindrome (898747898).

The spelling of 166225237 in words is "one hundred sixty-six million, two hundred twenty-five thousand, two hundred thirty-seven".