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56135521 = 1318123857
BaseRepresentation
bin1101011000100…
…0111101100001
310220121222110101
43112020331201
5103332314041
65323102401
71251100261
oct326107541
9126558411
1056135521
11297614a2
1216971a01
13b825cb0
1476537a1
154ddcb31
hex3588f61

56135521 has 8 divisors (see below), whose sum is σ = 60790184. Its totient is φ = 51528960.

The previous prime is 56135501. The next prime is 56135537. The reversal of 56135521 is 12553165.

56135521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9363600 + 46771921 = 3060^2 + 6839^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 56135521 - 27 = 56135393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56135521.

It is not an unprimeable number, because it can be changed into a prime (56135501) 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, 9576 + ... + 14281.

It is an arithmetic number, because the mean of its divisors is an integer number (7598773).

Almost surely, 256135521 is an apocalyptic number.

It is an amenable number.

56135521 is a deficient number, since it is larger than the sum of its proper divisors (4654663).

56135521 is a wasteful number, since it uses less digits than its factorization.

56135521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24051.

The product of its digits is 4500, while the sum is 28.

The square root of 56135521 is about 7492.3641796165. The cubic root of 56135521 is about 382.8946097733.

Adding to 56135521 its reverse (12553165), we get a palindrome (68688686).

The spelling of 56135521 in words is "fifty-six million, one hundred thirty-five thousand, five hundred twenty-one".

Divisors: 1 13 181 2353 23857 310141 4318117 56135521