56500020 has 36 divisors (see below), whose sum is σ = 171383940. Its totient is φ = 15066624.

The previous prime is 56500007. The next prime is 56500021. The reversal of 56500020 is 2000565.

It can be written as a sum of positive squares in 2 ways, for example, as 43797924 + 12702096 = 6618^2 + 3564^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 56499966 and 56500002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56500021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156765 + ... + 157124.

It is an arithmetic number, because the mean of its divisors is an integer number (4760665).

Almost surely, 2^56500020 is an apocalyptic number.

It is an amenable number.

56500020 is an abundant number, since it is smaller than the sum of its proper divisors (114883920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56500020 is a wasteful number, since it uses less digits than its factorization.

56500020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313904 (or 313899 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 56500020 is about 7516.6495195665. The cubic root of 56500020 is about 383.7215592174.

Adding to 56500020 its reverse (2000565), we get a palindrome (58500585).

The spelling of 56500020 in words is "fifty-six million, five hundred thousand, twenty".