3520213 has 4 divisors (see below), whose sum is σ = 3523968. Its totient is φ = 3516460.

The previous prime is 3520211. The next prime is 3520229. The reversal of 3520213 is 3120253.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3520213 - 2¹ = 3520211 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520211) 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, 858 + ... + 2788.

It is an arithmetic number, because the mean of its divisors is an integer number (880992).

Almost surely, 2^3520213 is an apocalyptic number.

It is an amenable number.

3520213 is a deficient number, since it is larger than the sum of its proper divisors (3755).

3520213 is a wasteful number, since it uses less digits than its factorization.

3520213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3754.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 3520213 is about 1876.2230677614. The cubic root of 3520213 is about 152.1211666598.

Adding to 3520213 its reverse (3120253), we get a palindrome (6640466).

It can be divided in two parts, 35 and 20213, that multiplied together give a triangular number (707455 = T₁₁₈₉).

The spelling of 3520213 in words is "three million, five hundred twenty thousand, two hundred thirteen".