164551223 has 4 divisors (see below), whose sum is σ = 171705648. Its totient is φ = 157396800.

The previous prime is 164551207. The next prime is 164551241. The reversal of 164551223 is 322155461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322155461 = 29 ⋅11108809.

It is a cyclic number.

It is not a de Polignac number, because 164551223 - 2⁴ = 164551207 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 (164551243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3577178 + ... + 3577223.

It is an arithmetic number, because the mean of its divisors is an integer number (42926412).

Almost surely, 2^164551223 is an apocalyptic number.

164551223 is a deficient number, since it is larger than the sum of its proper divisors (7154425).

164551223 is an equidigital number, since it uses as much as digits as its factorization.

164551223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7154424.

The product of its digits is 7200, while the sum is 29.

The square root of 164551223 is about 12827.7520633975. The cubic root of 164551223 is about 547.9829400891.

The spelling of 164551223 in words is "one hundred sixty-four million, five hundred fifty-one thousand, two hundred twenty-three".