165223001 has 4 divisors (see below), whose sum is σ = 168738432. Its totient is φ = 161707572.

The previous prime is 165222979. The next prime is 165223027. The reversal of 165223001 is 100322561.

165223001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165223001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165223061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757645 + ... + 1757738.

It is an arithmetic number, because the mean of its divisors is an integer number (42184608).

Almost surely, 2^165223001 is an apocalyptic number.

It is an amenable number.

165223001 is a deficient number, since it is larger than the sum of its proper divisors (3515431).

165223001 is an equidigital number, since it uses as much as digits as its factorization.

165223001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515430.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 165223001 is about 12853.9099498946. The cubic root of 165223001 is about 548.7276384223.

Adding to 165223001 its reverse (100322561), we get a palindrome (265545562).

The spelling of 165223001 in words is "one hundred sixty-five million, two hundred twenty-three thousand, one".