165630233 has 2 divisors, whose sum is σ = 165630234. Its totient is φ = 165630232.

The previous prime is 165630221. The next prime is 165630251. The reversal of 165630233 is 332036561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164531929 + 1098304 = 12827^2 + 1048^2 .

It is an emirp because it is prime and its reverse (332036561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165630233 - 2⁸ = 165629977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165630196 and 165630205.

It is not a weakly prime, because it can be changed into another prime (165630293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82815116 + 82815117.

It is an arithmetic number, because the mean of its divisors is an integer number (82815117).

Almost surely, 2^165630233 is an apocalyptic number.

It is an amenable number.

165630233 is a deficient number, since it is larger than the sum of its proper divisors (1).

165630233 is an equidigital number, since it uses as much as digits as its factorization.

165630233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 165630233 is about 12869.7409841846. The cubic root of 165630233 is about 549.1780924821.

Adding to 165630233 its reverse (332036561), we get a palindrome (497666794).

The spelling of 165630233 in words is "one hundred sixty-five million, six hundred thirty thousand, two hundred thirty-three".