2005521142 has 4 divisors (see below), whose sum is σ = 3008281716. Its totient is φ = 1002760570.

The previous prime is 2005521121. The next prime is 2005521143. The reversal of 2005521142 is 2411255002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005521143) 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 as a sum of consecutive naturals, namely, 501380284 + ... + 501380287.

It is an arithmetic number, because the mean of its divisors is an integer number (752070429).

Almost surely, 2^2005521142 is an apocalyptic number.

2005521142 is a deficient number, since it is larger than the sum of its proper divisors (1002760574).

2005521142 is a wasteful number, since it uses less digits than its factorization.

2005521142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002760573.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2005521142 is about 44783.0452515235. The cubic root of 2005521142 is about 1261.0793518604.

Adding to 2005521142 its reverse (2411255002), we get a palindrome (4416776144).

The spelling of 2005521142 in words is "two billion, five million, five hundred twenty-one thousand, one hundred forty-two".