56128225 has 12 divisors (see below), whose sum is σ = 70291260. Its totient is φ = 44456000.

The previous prime is 56128213. The next prime is 56128229. The reversal of 56128225 is 52282165.

56128225 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 6 ways, for example, as 58081 + 56070144 = 241^2 + 7488^2 .

It is not a de Polignac number, because 56128225 - 2⁹ = 56127713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56128229) 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 11 ways as a sum of consecutive naturals, for example, 8590 + ... + 13639.

It is an arithmetic number, because the mean of its divisors is an integer number (5857605).

Almost surely, 2^56128225 is an apocalyptic number.

It is an amenable number.

56128225 is a deficient number, since it is larger than the sum of its proper divisors (14163035).

56128225 is a wasteful number, since it uses less digits than its factorization.

56128225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22340 (or 22335 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 56128225 is about 7491.8772680817. The cubic root of 56128225 is about 382.8780206330.

The spelling of 56128225 in words is "fifty-six million, one hundred twenty-eight thousand, two hundred twenty-five".