165630223 has 8 divisors (see below), whose sum is σ = 186918480. Its totient is φ = 145380480.

The previous prime is 165630221. The next prime is 165630233. The reversal of 165630223 is 322036561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165630223 - 2¹ = 165630221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165630191 and 165630200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165630221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259290 + ... + 259927.

It is an arithmetic number, because the mean of its divisors is an integer number (23364810).

Almost surely, 2^165630223 is an apocalyptic number.

165630223 is a deficient number, since it is larger than the sum of its proper divisors (21288257).

165630223 is a wasteful number, since it uses less digits than its factorization.

165630223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519257.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 165630223 is about 12869.7405956764. The cubic root of 165630223 is about 549.1780814298.

Adding to 165630223 its reverse (322036561), we get a palindrome (487666784).

The spelling of 165630223 in words is "one hundred sixty-five million, six hundred thirty thousand, two hundred twenty-three".