3643231 has 4 divisors (see below), whose sum is σ = 3835000. Its totient is φ = 3451464.

The previous prime is 3643217. The next prime is 3643267. The reversal of 3643231 is 1323463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323463 = 53 ⋅24971.

It is a de Polignac number, because none of the positive numbers 2^k-3643231 is a prime.

It is a super-2 number, since 2×3643231² = 26546264238722, 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 (3643201) 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, 95856 + ... + 95893.

It is an arithmetic number, because the mean of its divisors is an integer number (958750).

Almost surely, 2^3643231 is an apocalyptic number.

3643231 is a deficient number, since it is larger than the sum of its proper divisors (191769).

3643231 is a wasteful number, since it uses less digits than its factorization.

3643231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191768.

The product of its digits is 1296, while the sum is 22.

The square root of 3643231 is about 1908.7249670919. The cubic root of 3643231 is about 153.8729344853.

Adding to 3643231 its reverse (1323463), we get a palindrome (4966694).

It can be divided in two parts, 36432 and 31, that added together give a palindrome (36463).

The spelling of 3643231 in words is "three million, six hundred forty-three thousand, two hundred thirty-one".