561031 has 8 divisors (see below), whose sum is σ = 588240. Its totient is φ = 534528.

The previous prime is 561019. The next prime is 561047. The reversal of 561031 is 130165.

561031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 561031 - 2¹⁵ = 528263 is a prime.

It is a super-2 number, since 2×561031² = 629511565922, which contains 22 as substring.

It is a Duffinian number.

561031 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 560996 and 561014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561061) 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, 2055 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (73530).

2⁵⁶¹⁰³¹ is an apocalyptic number.

561031 is a deficient number, since it is larger than the sum of its proper divisors (27209).

561031 is a wasteful number, since it uses less digits than its factorization.

561031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 561031 is about 749.0200264345. The cubic root of 561031 is about 82.4762588558.

Adding to 561031 its reverse (130165), we get a palindrome (691196).

The spelling of 561031 in words is "five hundred sixty-one thousand, thirty-one".