56104561 has 4 divisors (see below), whose sum is σ = 56123892. Its totient is φ = 56085232.

The previous prime is 56104547. The next prime is 56104571. The reversal of 56104561 is 16540165.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18662400 + 37442161 = 4320^2 + 6119^2 .

It is a cyclic number.

It is not a de Polignac number, because 56104561 - 2¹¹ = 56102513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56104501) 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, 4330 + ... + 11443.

It is an arithmetic number, because the mean of its divisors is an integer number (14030973).

Almost surely, 2^56104561 is an apocalyptic number.

It is an amenable number.

56104561 is a deficient number, since it is larger than the sum of its proper divisors (19331).

56104561 is a wasteful number, since it uses less digits than its factorization.

56104561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19330.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 56104561 is about 7490.2977911429. The cubic root of 56104561 is about 382.8242051709.

It can be divided in two parts, 56104 and 561, that added together give a palindrome (56665).

The spelling of 56104561 in words is "fifty-six million, one hundred four thousand, five hundred sixty-one".