164140223 has 4 divisors (see below), whose sum is σ = 176766408. Its totient is φ = 151514040.

The previous prime is 164140217. The next prime is 164140267. The reversal of 164140223 is 322041461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322041461 = 7 ⋅46005923.

It is a cyclic number.

It is not a de Polignac number, because 164140223 - 2⁸ = 164139967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164146223) 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, 6313073 + ... + 6313098.

It is an arithmetic number, because the mean of its divisors is an integer number (44191602).

Almost surely, 2^164140223 is an apocalyptic number.

164140223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

164140223 is a deficient number, since it is larger than the sum of its proper divisors (12626185).

164140223 is a wasteful number, since it uses less digits than its factorization.

164140223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12626184.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 164140223 is about 12811.7220934580. The cubic root of 164140223 is about 547.5263269312.

Adding to 164140223 its reverse (322041461), we get a palindrome (486181684).

The spelling of 164140223 in words is "one hundred sixty-four million, one hundred forty thousand, two hundred twenty-three".