56561361 has 8 divisors (see below), whose sum is σ = 75451584. Its totient is φ = 37689360.

The previous prime is 56561357. The next prime is 56561371. The reversal of 56561361 is 16316565.

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

It is not a de Polignac number, because 56561361 - 2² = 56561357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56561321) 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, 6580 + ... + 12506.

It is an arithmetic number, because the mean of its divisors is an integer number (9431448).

Almost surely, 2^56561361 is an apocalyptic number.

It is an amenable number.

56561361 is a deficient number, since it is larger than the sum of its proper divisors (18890223).

56561361 is a wasteful number, since it uses less digits than its factorization.

56561361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111.

The product of its digits is 16200, while the sum is 33.

The square root of 56561361 is about 7520.7287545822. The cubic root of 56561361 is about 383.8603753989.

The spelling of 56561361 in words is "fifty-six million, five hundred sixty-one thousand, three hundred sixty-one".