5631631 has 4 divisors (see below), whose sum is σ = 5641432. Its totient is φ = 5621832.

The previous prime is 5631629. The next prime is 5631671. The reversal of 5631631 is 1361365.

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 5631631 - 2¹ = 5631629 is a prime.

It is a super-2 number, since 2×5631631² = 63430535440322, 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 = 5631596 and 5631605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5631601) 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, 3981 + ... + 5206.

It is an arithmetic number, because the mean of its divisors is an integer number (1410358).

Almost surely, 2^5631631 is an apocalyptic number.

5631631 is a deficient number, since it is larger than the sum of its proper divisors (9801).

5631631 is an equidigital number, since it uses as much as digits as its factorization.

5631631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9800.

The product of its digits is 1620, while the sum is 25.

The square root of 5631631 is about 2373.1057709255. The cubic root of 5631631 is about 177.9145215136.

Adding to 5631631 its reverse (1361365), we get a palindrome (6992996).

The spelling of 5631631 in words is "five million, six hundred thirty-one thousand, six hundred thirty-one".