152820505 has 4 divisors (see below), whose sum is σ = 183384612. Its totient is φ = 122256400.

The previous prime is 152820491. The next prime is 152820527. The reversal of 152820505 is 505028251.

152820505 is nontrivially palindromic in base 16.

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 50466816 + 102353689 = 7104^2 + 10117^2 .

It is not a de Polignac number, because 152820505 - 2⁷ = 152820377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15282046 + ... + 15282055.

It is an arithmetic number, because the mean of its divisors is an integer number (45846153).

Almost surely, 2^152820505 is an apocalyptic number.

It is an amenable number.

152820505 is a deficient number, since it is larger than the sum of its proper divisors (30564107).

152820505 is an equidigital number, since it uses as much as digits as its factorization.

152820505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30564106.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 152820505 is about 12362.0590922386. The cubic root of 152820505 is about 534.6388863658.

Adding to 152820505 its reverse (505028251), we get a palindrome (657848756).

The spelling of 152820505 in words is "one hundred fifty-two million, eight hundred twenty thousand, five hundred five".