164522509 has 8 divisors (see below), whose sum is σ = 167072760. Its totient is φ = 161980416.

The previous prime is 164522497. The next prime is 164522521. The reversal of 164522509 is 905225461.

It is a happy number.

164522509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (164522497) and next prime (164522521).

It can be written as a sum of positive squares in 4 ways, for example, as 72420100 + 92102409 = 8510^2 + 9597^2 .

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 164522509 - 2¹⁹ = 163998221 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 (164522009) 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, 47757 + ... + 51085.

It is an arithmetic number, because the mean of its divisors is an integer number (20884095).

Almost surely, 2^164522509 is an apocalyptic number.

It is an amenable number.

164522509 is a deficient number, since it is larger than the sum of its proper divisors (2550251).

164522509 is an equidigital number, since it uses as much as digits as its factorization.

164522509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 164522509 is about 12826.6328005443. The cubic root of 164522509 is about 547.9510641030.

The spelling of 164522509 in words is "one hundred sixty-four million, five hundred twenty-two thousand, five hundred nine".