2005540237 has 4 divisors (see below), whose sum is σ = 2005645216. Its totient is φ = 2005435260.

The previous prime is 2005540189. The next prime is 2005540283. The reversal of 2005540237 is 7320455002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005540237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005540937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14823 + ... + 65044.

It is an arithmetic number, because the mean of its divisors is an integer number (501411304).

Almost surely, 2^2005540237 is an apocalyptic number.

It is an amenable number.

2005540237 is a deficient number, since it is larger than the sum of its proper divisors (104979).

2005540237 is an equidigital number, since it uses as much as digits as its factorization.

2005540237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104978.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 2005540237 is about 44783.2584455397. The cubic root of 2005540237 is about 1261.0833541840.

Adding to 2005540237 its reverse (7320455002), we get a palindrome (9325995239).

The spelling of 2005540237 in words is "two billion, five million, five hundred forty thousand, two hundred thirty-seven".