3521231 has 8 divisors (see below), whose sum is σ = 4199424. Its totient is φ = 2886840.

The previous prime is 3521201. The next prime is 3521237. The reversal of 3521231 is 1321253.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3521231 is a prime.

It is a super-2 number, since 2×3521231² = 24798135510722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10775 + ... + 11096.

It is an arithmetic number, because the mean of its divisors is an integer number (524928).

Almost surely, 2^3521231 is an apocalyptic number.

3521231 is a deficient number, since it is larger than the sum of its proper divisors (678193).

3521231 is a wasteful number, since it uses less digits than its factorization.

3521231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21901.

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

The square root of 3521231 is about 1876.4943378545. The cubic root of 3521231 is about 152.1358290701.

Adding to 3521231 its reverse (1321253), we get a palindrome (4842484).

The spelling of 3521231 in words is "three million, five hundred twenty-one thousand, two hundred thirty-one".