2005210385 has 4 divisors (see below), whose sum is σ = 2406252468. Its totient is φ = 1604168304.

The previous prime is 2005210381. The next prime is 2005210387. The reversal of 2005210385 is 5830125002.

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 879003904 + 1126206481 = 29648^2 + 33559^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005210385 - 2² = 2005210381 is a prime.

It is a super-2 number, since 2×2005210385² = 8041737376223696450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005210381) 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, 200521034 + ... + 200521043.

It is an arithmetic number, because the mean of its divisors is an integer number (601563117).

Almost surely, 2^2005210385 is an apocalyptic number.

It is an amenable number.

2005210385 is a deficient number, since it is larger than the sum of its proper divisors (401042083).

2005210385 is an equidigital number, since it uses as much as digits as its factorization.

2005210385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401042082.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2005210385 is about 44779.5755339418. The cubic root of 2005210385 is about 1261.0142134332.

Adding to 2005210385 its reverse (5830125002), we get a palindrome (7835335387).

The spelling of 2005210385 in words is "two billion, five million, two hundred ten thousand, three hundred eighty-five".