164551 has 4 divisors (see below), whose sum is σ = 167400. Its totient is φ = 161704.

The previous prime is 164531. The next prime is 164569. The reversal of 164551 is 155461.

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

It is a cyclic number.

It is not a de Polignac number, because 164551 - 2⁹ = 164039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164531) 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, 1336 + ... + 1453.

It is an arithmetic number, because the mean of its divisors is an integer number (41850).

2¹⁶⁴⁵⁵¹ is an apocalyptic number.

164551 is a deficient number, since it is larger than the sum of its proper divisors (2849).

164551 is an equidigital number, since it uses as much as digits as its factorization.

164551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848.

The product of its digits is 600, while the sum is 22.

The square root of 164551 is about 405.6488629344. The cubic root of 164551 is about 54.7982692547.

The spelling of 164551 in words is "one hundred sixty-four thousand, five hundred fifty-one".