5631331 has 4 divisors (see below), whose sum is σ = 5636664. Its totient is φ = 5626000.

The previous prime is 5631317. The next prime is 5631341. The reversal of 5631331 is 1331365.

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.

It is a cyclic number.

It is not a de Polignac number, because 5631331 - 2⁵ = 5631299 is a prime.

It is a super-2 number, since 2×5631331² = 63423777663122, which contains 22 as substring.

It is a Duffinian number.

5631331 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5631341) 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, 490 + ... + 3391.

It is an arithmetic number, because the mean of its divisors is an integer number (1409166).

Almost surely, 2^5631331 is an apocalyptic number.

5631331 is a deficient number, since it is larger than the sum of its proper divisors (5333).

5631331 is a wasteful number, since it uses less digits than its factorization.

5631331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332.

The product of its digits is 810, while the sum is 22.

The square root of 5631331 is about 2373.0425617759. The cubic root of 5631331 is about 177.9113622569.

Adding to 5631331 its reverse (1331365), we get a palindrome (6962696).

The spelling of 5631331 in words is "five million, six hundred thirty-one thousand, three hundred thirty-one".