2001505255 has 4 divisors (see below), whose sum is σ = 2401806312. Its totient is φ = 1601204200.

The previous prime is 2001505223. The next prime is 2001505279. The reversal of 2001505255 is 5525051002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2001505255 - 2⁵ = 2001505223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200150521 + ... + 200150530.

It is an arithmetic number, because the mean of its divisors is an integer number (600451578).

Almost surely, 2^2001505255 is an apocalyptic number.

2001505255 is a deficient number, since it is larger than the sum of its proper divisors (400301057).

2001505255 is an equidigital number, since it uses as much as digits as its factorization.

2001505255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400301056.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 2001505255 is about 44738.1856471628. The cubic root of 2001505255 is about 1260.2370543736.

Adding to 2001505255 its reverse (5525051002), we get a palindrome (7526556257).

The spelling of 2001505255 in words is "two billion, one million, five hundred five thousand, two hundred fifty-five".