56735521 has 4 divisors (see below), whose sum is σ = 57697200. Its totient is φ = 55773844.

The previous prime is 56735507. The next prime is 56735531. The reversal of 56735521 is 12553765.

56735521 is digitally balanced in base 2, 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 a cyclic number.

It is not a de Polignac number, because 56735521 - 2⁵ = 56735489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56735531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480751 + ... + 480868.

It is an arithmetic number, because the mean of its divisors is an integer number (14424300).

Almost surely, 2^56735521 is an apocalyptic number.

It is an amenable number.

56735521 is a deficient number, since it is larger than the sum of its proper divisors (961679).

56735521 is an equidigital number, since it uses as much as digits as its factorization.

56735521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961678.

The product of its digits is 31500, while the sum is 34.

The square root of 56735521 is about 7532.2985203721. The cubic root of 56735521 is about 384.2539575332.

The spelling of 56735521 in words is "fifty-six million, seven hundred thirty-five thousand, five hundred twenty-one".