5561731 has 8 divisors (see below), whose sum is σ = 6370560. Its totient is φ = 4756488.

The previous prime is 5561719. The next prime is 5561779. The reversal of 5561731 is 1371655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5561731 - 2⁹ = 5561219 is a prime.

It is a super-2 number, since 2×5561731² = 61865703432722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5561731.

It is not an unprimeable number, because it can be changed into a prime (5561701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5400 + ... + 6346.

It is an arithmetic number, because the mean of its divisors is an integer number (796320).

Almost surely, 2^5561731 is an apocalyptic number.

5561731 is a deficient number, since it is larger than the sum of its proper divisors (808829).

5561731 is an equidigital number, since it uses as much as digits as its factorization.

5561731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793.

The product of its digits is 3150, while the sum is 28.

The square root of 5561731 is about 2358.3322497053. The cubic root of 5561731 is about 177.1753611196.

Adding to 5561731 its product of digits (3150), we get a square (5564881 = 2359²).

The spelling of 5561731 in words is "five million, five hundred sixty-one thousand, seven hundred thirty-one".