2005321554 has 12 divisors (see below), whose sum is σ = 4344863406. Its totient is φ = 668440512.

The previous prime is 2005321519. The next prime is 2005321589. The reversal of 2005321554 is 4551235002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2005321519) and next prime (2005321589).

It can be written as a sum of positive squares in only one way, i.e., 1999431225 + 5890329 = 44715^2 + 2427^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 55703359 + ... + 55703394.

Almost surely, 2^2005321554 is an apocalyptic number.

2005321554 is an abundant number, since it is smaller than the sum of its proper divisors (2339541852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2005321554 is a wasteful number, since it uses less digits than its factorization.

2005321554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111406761 (or 111406758 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2005321554 is about 44780.8168080932. The cubic root of 2005321554 is about 1261.0375165738.

Adding to 2005321554 its reverse (4551235002), we get a palindrome (6556556556).

The spelling of 2005321554 in words is "two billion, five million, three hundred twenty-one thousand, five hundred fifty-four".