3205013021 has 24 divisors (see below), whose sum is σ = 3770864640. Its totient is φ = 2715939072.

The previous prime is 3205013003. The next prime is 3205013033. The reversal of 3205013021 is 1203105023.

It is not a de Polignac number, because 3205013021 - 2⁶ = 3205012957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3205013521) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2195990 + ... + 2197448.

It is an arithmetic number, because the mean of its divisors is an integer number (157119360).

Almost surely, 2^3205013021 is an apocalyptic number.

It is an amenable number.

3205013021 is a deficient number, since it is larger than the sum of its proper divisors (565851619).

3205013021 is a wasteful number, since it uses less digits than its factorization.

3205013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953 (or 1946 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 3205013021 is about 56612.8344194141. The cubic root of 3205013021 is about 1474.3817032806.

Adding to 3205013021 its reverse (1203105023), we get a palindrome (4408118044).

The spelling of 3205013021 in words is "three billion, two hundred five million, thirteen thousand, twenty-one".