165954223 has 4 divisors (see below), whose sum is σ = 173169648. Its totient is φ = 158738800.

The previous prime is 165954163. The next prime is 165954241. The reversal of 165954223 is 322459561.

165954223 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 an emirpimes, since its reverse is a distinct semiprime: 322459561 = 223 ⋅1446007.

It is a cyclic number.

It is not a de Polignac number, because 165954223 - 2¹³ = 165946031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165954823) 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, 3607678 + ... + 3607723.

It is an arithmetic number, because the mean of its divisors is an integer number (43292412).

Almost surely, 2^165954223 is an apocalyptic number.

165954223 is a deficient number, since it is larger than the sum of its proper divisors (7215425).

165954223 is an equidigital number, since it uses as much as digits as its factorization.

165954223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7215424.

The product of its digits is 64800, while the sum is 37.

The square root of 165954223 is about 12882.3221121039. The cubic root of 165954223 is about 549.5359424500.

The spelling of 165954223 in words is "one hundred sixty-five million, nine hundred fifty-four thousand, two hundred twenty-three".