3213505 has 4 divisors (see below), whose sum is σ = 3856212. Its totient is φ = 2570800.

The previous prime is 3213499. The next prime is 3213559. The reversal of 3213505 is 5053123.

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 467856 + 2745649 = 684^2 + 1657^2 .

It is not a de Polignac number, because 3213505 - 2⁵ = 3213473 is a prime.

It is a super-2 number, since 2×3213505² = 20653228770050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321346 + ... + 321355.

It is an arithmetic number, because the mean of its divisors is an integer number (964053).

Almost surely, 2^3213505 is an apocalyptic number.

It is an amenable number.

3213505 is a deficient number, since it is larger than the sum of its proper divisors (642707).

3213505 is an equidigital number, since it uses as much as digits as its factorization.

3213505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642706.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 3213505 is about 1792.6251699672. The cubic root of 3213505 is about 147.5682725214.

Adding to 3213505 its reverse (5053123), we get a palindrome (8266628).

The spelling of 3213505 in words is "three million, two hundred thirteen thousand, five hundred five".