165624223 has 2 divisors, whose sum is σ = 165624224. Its totient is φ = 165624222.

The previous prime is 165624203. The next prime is 165624253. The reversal of 165624223 is 322426561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165624223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165624203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82812111 + 82812112.

It is an arithmetic number, because the mean of its divisors is an integer number (82812112).

Almost surely, 2^165624223 is an apocalyptic number.

165624223 is a deficient number, since it is larger than the sum of its proper divisors (1).

165624223 is an equidigital number, since it uses as much as digits as its factorization.

165624223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 165624223 is about 12869.5074886337. The cubic root of 165624223 is about 549.1714499744.

The spelling of 165624223 in words is "one hundred sixty-five million, six hundred twenty-four thousand, two hundred twenty-three".