164520233 has 4 divisors (see below), whose sum is σ = 167217348. Its totient is φ = 161823120.

The previous prime is 164520227. The next prime is 164520247. The reversal of 164520233 is 332025461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27793984 + 136726249 = 5272^2 + 11693^2 .

It is a cyclic number.

It is not a de Polignac number, because 164520233 - 2¹² = 164516137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164520263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348466 + ... + 1348587.

It is an arithmetic number, because the mean of its divisors is an integer number (41804337).

Almost surely, 2^164520233 is an apocalyptic number.

It is an amenable number.

164520233 is a deficient number, since it is larger than the sum of its proper divisors (2697115).

164520233 is an equidigital number, since it uses as much as digits as its factorization.

164520233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697114.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 164520233 is about 12826.5440785895. The cubic root of 164520233 is about 547.9485373113.

Adding to 164520233 its reverse (332025461), we get a palindrome (496545694).

The spelling of 164520233 in words is "one hundred sixty-four million, five hundred twenty thousand, two hundred thirty-three".