164218241 has 4 divisors (see below), whose sum is σ = 179147184. Its totient is φ = 149289300.

The previous prime is 164218177. The next prime is 164218259. The reversal of 164218241 is 142812461.

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 not a de Polignac number, because 164218241 - 2⁶ = 164218177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164218441) 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, 7464455 + ... + 7464476.

It is an arithmetic number, because the mean of its divisors is an integer number (44786796).

Almost surely, 2^164218241 is an apocalyptic number.

164218241 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

164218241 is a deficient number, since it is larger than the sum of its proper divisors (14928943).

164218241 is a wasteful number, since it uses less digits than its factorization.

164218241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14928942.

The product of its digits is 3072, while the sum is 29.

The square root of 164218241 is about 12814.7665214783. The cubic root of 164218241 is about 547.6130620045.

The spelling of 164218241 in words is "one hundred sixty-four million, two hundred eighteen thousand, two hundred forty-one".