151809 has 8 divisors (see below), whose sum is σ = 231360. Its totient is φ = 86736.

The previous prime is 151799. The next prime is 151813. The reversal of 151809 is 908151.

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

It is not a de Polignac number, because 151809 - 2⁷ = 151681 is a prime.

It is a Curzon number.

151809 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 151809.

It is not an unprimeable number, because it can be changed into a prime (151849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3594 + ... + 3635.

It is an arithmetic number, because the mean of its divisors is an integer number (28920).

2¹⁵¹⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

151809 is a deficient number, since it is larger than the sum of its proper divisors (79551).

151809 is an equidigital number, since it uses as much as digits as its factorization.

151809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7239.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 151809 is about 389.6267444619. The cubic root of 151809 is about 53.3456698893.

The spelling of 151809 in words is "one hundred fifty-one thousand, eight hundred nine".