164271281 has 4 divisors (see below), whose sum is σ = 167055600. Its totient is φ = 161486964.

The previous prime is 164271259. The next prime is 164271287. The reversal of 164271281 is 182172461.

It is a happy number.

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 164271281 - 2¹⁸ = 164009137 is a prime.

It is a super-2 number, since 2×164271281² = 53970107522761922, 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 (164271287) 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, 1392071 + ... + 1392188.

It is an arithmetic number, because the mean of its divisors is an integer number (41763900).

Almost surely, 2^164271281 is an apocalyptic number.

It is an amenable number.

164271281 is a deficient number, since it is larger than the sum of its proper divisors (2784319).

164271281 is an equidigital number, since it uses as much as digits as its factorization.

164271281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784318.

The product of its digits is 5376, while the sum is 32.

The square root of 164271281 is about 12816.8358419697. The cubic root of 164271281 is about 547.6720125614.

The spelling of 164271281 in words is "one hundred sixty-four million, two hundred seventy-one thousand, two hundred eighty-one".