164557205 has 4 divisors (see below), whose sum is σ = 197468652. Its totient is φ = 131645760.

The previous prime is 164557201. The next prime is 164557213. The reversal of 164557205 is 502755461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 124500964 + 40056241 = 11158^2 + 6329^2 .

It is not a de Polignac number, because 164557205 - 2² = 164557201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164557201) 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, 16455716 + ... + 16455725.

It is an arithmetic number, because the mean of its divisors is an integer number (49367163).

Almost surely, 2^164557205 is an apocalyptic number.

It is an amenable number.

164557205 is a deficient number, since it is larger than the sum of its proper divisors (32911447).

164557205 is an equidigital number, since it uses as much as digits as its factorization.

164557205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32911446.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 164557205 is about 12827.9852276186. The cubic root of 164557205 is about 547.9895803603.

The spelling of 164557205 in words is "one hundred sixty-four million, five hundred fifty-seven thousand, two hundred five".