3231631 has 4 divisors (see below), whose sum is σ = 3480232. Its totient is φ = 2983032.

The previous prime is 3231619. The next prime is 3231643. The reversal of 3231631 is 1361323.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1361323 = 41 ⋅33203.

It is an interprime number because it is at equal distance from previous prime (3231619) and next prime (3231643).

It is not a de Polignac number, because 3231631 - 2⁹ = 3231119 is a prime.

It is a super-2 number, since 2×3231631² = 20886877840322, which contains 22 as substring.

It is a Duffinian number.

3231631 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3231599 and 3231608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231671) 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, 124281 + ... + 124306.

It is an arithmetic number, because the mean of its divisors is an integer number (870058).

Almost surely, 2^3231631 is an apocalyptic number.

3231631 is a deficient number, since it is larger than the sum of its proper divisors (248601).

3231631 is a wasteful number, since it uses less digits than its factorization.

3231631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248600.

The product of its digits is 324, while the sum is 19.

The square root of 3231631 is about 1797.6737746321. The cubic root of 3231631 is about 147.8452088711.

Adding to 3231631 its reverse (1361323), we get a palindrome (4592954).

The spelling of 3231631 in words is "three million, two hundred thirty-one thousand, six hundred thirty-one".