561340131 has 8 divisors (see below), whose sum is σ = 816494784. Its totient is φ = 340206120.

The previous prime is 561340121. The next prime is 561340133. The reversal of 561340131 is 131043165.

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

It is not a de Polignac number, because 561340131 - 2¹⁵ = 561307363 is a prime.

It is a super-2 number, since 2×561340131² = 630205485342194322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (561340133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8505121 + ... + 8505186.

It is an arithmetic number, because the mean of its divisors is an integer number (102061848).

Almost surely, 2^561340131 is an apocalyptic number.

561340131 is a deficient number, since it is larger than the sum of its proper divisors (255154653).

561340131 is a wasteful number, since it uses less digits than its factorization.

561340131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17010321.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 561340131 is about 23692.6176476978. The cubic root of 561340131 is about 824.9140435698.

Adding to 561340131 its reverse (131043165), we get a palindrome (692383296).

The spelling of 561340131 in words is "five hundred sixty-one million, three hundred forty thousand, one hundred thirty-one".