164801281 has 8 divisors (see below), whose sum is σ = 174735144. Its totient is φ = 154894080.

The previous prime is 164801267. The next prime is 164801291. The reversal of 164801281 is 182108461.

It can be written as a sum of positive squares in 4 ways, for example, as 35046400 + 129754881 = 5920^2 + 11391^2 .

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 164801281 - 2¹³ = 164793089 is a prime.

It is a super-2 number, since 2×164801281² = 54318924438481922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164801251) 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, 6871 + ... + 19411.

It is an arithmetic number, because the mean of its divisors is an integer number (21841893).

Almost surely, 2^164801281 is an apocalyptic number.

It is an amenable number.

164801281 is a deficient number, since it is larger than the sum of its proper divisors (9933863).

164801281 is a wasteful number, since it uses less digits than its factorization.

164801281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13331.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 164801281 is about 12837.4951217128. The cubic root of 164801281 is about 548.2603778446.

The spelling of 164801281 in words is "one hundred sixty-four million, eight hundred one thousand, two hundred eighty-one".