56501553 has 8 divisors (see below), whose sum is σ = 77371648. Its totient is φ = 36649584.

The previous prime is 56501537. The next prime is 56501581. The reversal of 56501553 is 35510565.

56501553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 56501553 - 2⁴ = 56501537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56501553.

It is not an unprimeable number, because it can be changed into a prime (56501453) 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 7 ways as a sum of consecutive naturals, for example, 254401 + ... + 254622.

It is an arithmetic number, because the mean of its divisors is an integer number (9671456).

Almost surely, 2^56501553 is an apocalyptic number.

It is an amenable number.

56501553 is a deficient number, since it is larger than the sum of its proper divisors (20870095).

56501553 is a wasteful number, since it uses less digits than its factorization.

56501553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509063.

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 56501553 is about 7516.7514924999. The cubic root of 56501553 is about 383.7250296576.

The spelling of 56501553 in words is "fifty-six million, five hundred one thousand, five hundred fifty-three".