561513 has 4 divisors (see below), whose sum is σ = 748688. Its totient is φ = 374340.

The previous prime is 561461. The next prime is 561521. The reversal of 561513 is 315165.

It is a happy number.

561513 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 561513 - 2¹⁰ = 560489 is a prime.

It is a D-number.

It is a Duffinian number.

561513 is strictly pandigital in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 561513.

It is not an unprimeable number, because it can be changed into a prime (561553) 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, 93583 + ... + 93588.

It is an arithmetic number, because the mean of its divisors is an integer number (187172).

2⁵⁶¹⁵¹³ is an apocalyptic number.

It is an amenable number.

561513 is a deficient number, since it is larger than the sum of its proper divisors (187175).

561513 is a wasteful number, since it uses less digits than its factorization.

561513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187174.

The product of its digits is 450, while the sum is 21.

The square root of 561513 is about 749.3417111038. The cubic root of 561513 is about 82.4998714415.

Adding to 561513 its reverse (315165), we get a palindrome (876678).

The spelling of 561513 in words is "five hundred sixty-one thousand, five hundred thirteen".