3201631 has 4 divisors (see below), whose sum is σ = 3205872. Its totient is φ = 3197392.

The previous prime is 3201619. The next prime is 3201641. The reversal of 3201631 is 1361023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3201631 - 2¹³ = 3193439 is a prime.

It is a super-2 number, since 2×3201631² = 20500882120322, 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 (3201641) 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, 646 + ... + 2611.

It is an arithmetic number, because the mean of its divisors is an integer number (801468).

Almost surely, 2^3201631 is an apocalyptic number.

3201631 is a deficient number, since it is larger than the sum of its proper divisors (4241).

3201631 is an equidigital number, since it uses as much as digits as its factorization.

3201631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 3201631 is about 1789.3102022847. The cubic root of 3201631 is about 147.3862917574.

Adding to 3201631 its reverse (1361023), we get a palindrome (4562654).

The spelling of 3201631 in words is "three million, two hundred one thousand, six hundred thirty-one".