2005523243 has 4 divisors (see below), whose sum is σ = 2012056200. Its totient is φ = 1998990288.

The previous prime is 2005523239. The next prime is 2005523263. The reversal of 2005523243 is 3423255002.

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

It is a cyclic number.

It is not a de Polignac number, because 2005523243 - 2² = 2005523239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005523263) by changing a digit.

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, 3266018 + ... + 3266631.

It is an arithmetic number, because the mean of its divisors is an integer number (503014050).

Almost surely, 2^2005523243 is an apocalyptic number.

2005523243 is a deficient number, since it is larger than the sum of its proper divisors (6532957).

2005523243 is an equidigital number, since it uses as much as digits as its factorization.

2005523243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6532956.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 2005523243 is about 44783.0687090557. The cubic root of 2005523243 is about 1261.0797922326.

Adding to 2005523243 its reverse (3423255002), we get a palindrome (5428778245).

The spelling of 2005523243 in words is "two billion, five million, five hundred twenty-three thousand, two hundred forty-three".