2005521402 has 16 divisors (see below), whose sum is σ = 4222150560. Its totient is φ = 633322512.

The previous prime is 2005521379. The next prime is 2005521407. The reversal of 2005521402 is 2041255002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2005521407) 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, 8796033 + ... + 8796260.

It is an arithmetic number, because the mean of its divisors is an integer number (263884410).

Almost surely, 2^2005521402 is an apocalyptic number.

2005521402 is an abundant number, since it is smaller than the sum of its proper divisors (2216629158).

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

2005521402 is a wasteful number, since it uses less digits than its factorization.

2005521402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17592317.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2005521402 is about 44783.0481544077. The cubic root of 2005521402 is about 1261.0794063568.

Adding to 2005521402 its reverse (2041255002), we get a palindrome (4046776404).

The spelling of 2005521402 in words is "two billion, five million, five hundred twenty-one thousand, four hundred two".