165251489 has 8 divisors (see below), whose sum is σ = 180216960. Its totient is φ = 150608016.

The previous prime is 165251473. The next prime is 165251491. The reversal of 165251489 is 984152561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165251489 - 2⁴ = 165251473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165251459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79427 + ... + 81480.

It is an arithmetic number, because the mean of its divisors is an integer number (22527120).

Almost surely, 2^165251489 is an apocalyptic number.

It is an amenable number.

165251489 is a deficient number, since it is larger than the sum of its proper divisors (14965471).

165251489 is a wasteful number, since it uses less digits than its factorization.

165251489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160999.

The product of its digits is 86400, while the sum is 41.

The square root of 165251489 is about 12855.0180474397. The cubic root of 165251489 is about 548.7591740933.

The spelling of 165251489 in words is "one hundred sixty-five million, two hundred fifty-one thousand, four hundred eighty-nine".