3205404431 has 4 divisors (see below), whose sum is σ = 3207103200. Its totient is φ = 3203705664.

The previous prime is 3205404421. The next prime is 3205404439. The reversal of 3205404431 is 1344045023.

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

It is a cyclic number.

It is not a de Polignac number, because 3205404431 - 2¹⁰ = 3205403407 is a prime.

It is a super-2 number, since 2×3205404431² = 20549235132548867522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3205404431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3205404439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846551 + ... + 850328.

It is an arithmetic number, because the mean of its divisors is an integer number (801775800).

Almost surely, 2^3205404431 is an apocalyptic number.

3205404431 is a deficient number, since it is larger than the sum of its proper divisors (1698769).

3205404431 is a wasteful number, since it uses less digits than its factorization.

3205404431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698768.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 3205404431 is about 56616.2912155150. The cubic root of 3205404431 is about 1474.4417201196.

Adding to 3205404431 its reverse (1344045023), we get a palindrome (4549449454).

The spelling of 3205404431 in words is "three billion, two hundred five million, four hundred four thousand, four hundred thirty-one".