5567981 has 4 divisors (see below), whose sum is σ = 5605500. Its totient is φ = 5530464.

The previous prime is 5567963. The next prime is 5567987. The reversal of 5567981 is 1897655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1897655 = 5 ⋅379531.

It can be written as a sum of positive squares in 2 ways, for example, as 2449225 + 3118756 = 1565^2 + 1766^2 .

It is a cyclic number.

It is not a de Polignac number, because 5567981 - 2²² = 1373677 is a prime.

It is a super-2 number, since 2×5567981² = 62004824832722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 5⁸ + 5⁸ + 6⁴ + 7⁴ + 9⁷ + 8² + 1 .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5567987) 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, 18536 + ... + 18833.

It is an arithmetic number, because the mean of its divisors is an integer number (1401375).

Almost surely, 2^5567981 is an apocalyptic number.

It is an amenable number.

5567981 is a deficient number, since it is larger than the sum of its proper divisors (37519).

5567981 is a wasteful number, since it uses less digits than its factorization.

5567981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37518.

The product of its digits is 75600, while the sum is 41.

The square root of 5567981 is about 2359.6569665949. The cubic root of 5567981 is about 177.2417032633.

The spelling of 5567981 in words is "five million, five hundred sixty-seven thousand, nine hundred eighty-one".