165482509 has 4 divisors (see below), whose sum is σ = 165586716. Its totient is φ = 165378304.

The previous prime is 165482507. The next prime is 165482521. The reversal of 165482509 is 905284561.

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 121220100 + 44262409 = 11010^2 + 6653^2 .

It is a cyclic number.

It is not a de Polignac number, because 165482509 - 2¹ = 165482507 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 (165482503) 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, 49684 + ... + 52909.

It is an arithmetic number, because the mean of its divisors is an integer number (41396679).

Almost surely, 2^165482509 is an apocalyptic number.

It is an amenable number.

165482509 is a deficient number, since it is larger than the sum of its proper divisors (104207).

165482509 is a wasteful number, since it uses less digits than its factorization.

165482509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104206.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 165482509 is about 12864.0005052861. Note that the first 3 decimals coincide. The cubic root of 165482509 is about 549.0147750455.

The spelling of 165482509 in words is "one hundred sixty-five million, four hundred eighty-two thousand, five hundred nine".