5565631 has 4 divisors (see below), whose sum is σ = 5570352. Its totient is φ = 5560912.

The previous prime is 5565611. The next prime is 5565641. The reversal of 5565631 is 1365655.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1365655 = 5 ⋅273131.

It is a cyclic number.

It is not a de Polignac number, because 5565631 - 2¹¹ = 5563583 is a prime.

It is a super-2 number, since 2×5565631² = 61952496856322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5565593 and 5565602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5565611) 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, 1086 + ... + 3508.

It is an arithmetic number, because the mean of its divisors is an integer number (1392588).

Almost surely, 2^5565631 is an apocalyptic number.

5565631 is a deficient number, since it is larger than the sum of its proper divisors (4721).

5565631 is a wasteful number, since it uses less digits than its factorization.

5565631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4720.

The product of its digits is 13500, while the sum is 31.

The square root of 5565631 is about 2359.1589603077. The cubic root of 5565631 is about 177.2167644441.

The spelling of 5565631 in words is "five million, five hundred sixty-five thousand, six hundred thirty-one".