2005521154 has 16 divisors (see below), whose sum is σ = 3702500928. Its totient is φ = 793392912.

The previous prime is 2005521151. The next prime is 2005521211. The reversal of 2005521154 is 4511255002.

It is not an unprimeable number, because it can be changed into a prime (2005521151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5509492 + ... + 5509855.

It is an arithmetic number, because the mean of its divisors is an integer number (231406308).

Almost surely, 2^2005521154 is an apocalyptic number.

2005521154 is a deficient number, since it is larger than the sum of its proper divisors (1696979774).

2005521154 is a wasteful number, since it uses less digits than its factorization.

2005521154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11019369.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 2005521154 is about 44783.0453855028. The cubic root of 2005521154 is about 1261.0793543757.

Adding to 2005521154 its reverse (4511255002), we get a palindrome (6516776156).

It can be divided in two parts, 20055 and 21154, that added together give a square (41209 = 203²).

The spelling of 2005521154 in words is "two billion, five million, five hundred twenty-one thousand, one hundred fifty-four".