164805281 has 8 divisors (see below), whose sum is σ = 176166144. Its totient is φ = 153794080.

The previous prime is 164805257. The next prime is 164805307. The reversal of 164805281 is 182508461.

164805281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164805281 - 2⁶ = 164805217 is a prime.

It is a super-2 number, since 2×164805281² = 54321561290977922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164805181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86441 + ... + 88326.

It is an arithmetic number, because the mean of its divisors is an integer number (22020768).

Almost surely, 2^164805281 is an apocalyptic number.

It is an amenable number.

164805281 is a deficient number, since it is larger than the sum of its proper divisors (11360863).

164805281 is a wasteful number, since it uses less digits than its factorization.

164805281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174831.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 164805281 is about 12837.6509144002. The cubic root of 164805281 is about 548.2648135378.

The spelling of 164805281 in words is "one hundred sixty-four million, eight hundred five thousand, two hundred eighty-one".