56635321 has 4 divisors (see below), whose sum is σ = 56657700. Its totient is φ = 56612944.

The previous prime is 56635307. The next prime is 56635349. The reversal of 56635321 is 12353665.

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 36060025 + 20575296 = 6005^2 + 4536^2 .

It is a cyclic number.

It is not a de Polignac number, because 56635321 - 2⁷ = 56635193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56635121) 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, 6826 + ... + 12643.

It is an arithmetic number, because the mean of its divisors is an integer number (14164425).

Almost surely, 2^56635321 is an apocalyptic number.

It is an amenable number.

56635321 is a deficient number, since it is larger than the sum of its proper divisors (22379).

56635321 is a wasteful number, since it uses less digits than its factorization.

56635321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22378.

The product of its digits is 16200, while the sum is 31.

The square root of 56635321 is about 7525.6442249152. The cubic root of 56635321 is about 384.0276152919.

Adding to 56635321 its reverse (12353665), we get a palindrome (68988986).

The spelling of 56635321 in words is "fifty-six million, six hundred thirty-five thousand, three hundred twenty-one".