561282815 has 4 divisors (see below), whose sum is σ = 673539384. Its totient is φ = 449026248.

The previous prime is 561282809. The next prime is 561282817. The reversal of 561282815 is 518282165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561282815 - 2⁶ = 561282751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561282817) 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, 56128277 + ... + 56128286.

It is an arithmetic number, because the mean of its divisors is an integer number (168384846).

Almost surely, 2^561282815 is an apocalyptic number.

561282815 is a deficient number, since it is larger than the sum of its proper divisors (112256569).

561282815 is a wasteful number, since it uses less digits than its factorization.

561282815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112256568.

The product of its digits is 38400, while the sum is 38.

The square root of 561282815 is about 23691.4080417353. The cubic root of 561282815 is about 824.8859664854.

The spelling of 561282815 in words is "five hundred sixty-one million, two hundred eighty-two thousand, eight hundred fifteen".