2005210001 has 4 divisors (see below), whose sum is σ = 2054117604. Its totient is φ = 1956302400.

The previous prime is 2005209971. The next prime is 2005210033. The reversal of 2005210001 is 1000125002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31629376 + 1973580625 = 5624^2 + 44425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005210001 is a prime.

It is a super-2 number, since 2×2005210001² = 8041734296220840002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005210091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24453740 + ... + 24453821.

It is an arithmetic number, because the mean of its divisors is an integer number (513529401).

Almost surely, 2^2005210001 is an apocalyptic number.

It is an amenable number.

2005210001 is a deficient number, since it is larger than the sum of its proper divisors (48907603).

2005210001 is an equidigital number, since it uses as much as digits as its factorization.

2005210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48907602.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 2005210001 is about 44779.5712462726. The cubic root of 2005210001 is about 1261.0141329380.

Adding to 2005210001 its reverse (1000125002), we get a palindrome (3005335003).

The spelling of 2005210001 in words is "two billion, five million, two hundred ten thousand, one".