3581231 has 4 divisors (see below), whose sum is σ = 3585264. Its totient is φ = 3577200.

The previous prime is 3581219. The next prime is 3581251. The reversal of 3581231 is 1321853.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1321853 = 13 ⋅101681.

It is a cyclic number.

It is not a de Polignac number, because 3581231 - 2⁶ = 3581167 is a prime.

It is a super-2 number, since 2×3581231² = 25650430950722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3581197 and 3581206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3581251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35 + ... + 2676.

It is an arithmetic number, because the mean of its divisors is an integer number (896316).

Almost surely, 2^3581231 is an apocalyptic number.

3581231 is a deficient number, since it is larger than the sum of its proper divisors (4033).

3581231 is a wasteful number, since it uses less digits than its factorization.

3581231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4032.

The product of its digits is 720, while the sum is 23.

The square root of 3581231 is about 1892.4140667412. The cubic root of 3581231 is about 152.9950729614.

The spelling of 3581231 in words is "three million, five hundred eighty-one thousand, two hundred thirty-one".